Yes, you can find parallels with recent and extended history, but as you mentioned these are better not be discussed here.
I think it will be interesting to find out that CA has had a presence in humanity since ancient times. Through small scale shasvastii infiltration and maybe some bigger more dramatic actions like things described in Vedic texts. We find out aleph is actually the culmination of the EI's long game grooming humanity into there next weapon and what conflicts we are seeing between humanity and CA now is a weapons test as well as purging humanity of any possible decenters. I know this is far out there. but I think it would be neat. the human factions split between who will follow the EI after they claim themselves to be behind the religious movements that culminated in ALEPH, (like maybe the neovatican), and the humans that don't buy the EL as the true god, even if they did influenced holy texts, (like maybe the observance). Maybe the human resistance even inspires some of the species in CA to turn on the EI
Hate to be the bearer of bad news but it's being designed by a board game company, it's probably going to be a board game and not an Infinity version of Star Wars Armada.
I can only say I don’t care for the extreme leap of logic, in comparison to the existing game. Believe me, I have a high tolerance for leaps in logic by being a comic book fan for over 40 years. It feels like the story has been ret-conned (maybe not right word) to allow for a game they think they can sell.
I'd definitely be keen to see a human win in the next book, just to mix things up a bit. Recent books have largely dialled up CA pressure and they've won a good few victories.
I see both points; but war (which we all know, never changes) is more than just Gruoup A with 100k on one side of the field/ship/spacecraft vs Group B of 100k on the other side. Covert ops/special missions away from the main theatre of war were, are and always will be a thing, cause u dont need an army to assassinate a single general, or infiltrate and extrate some valid information, or sabotage some important supply chains, and so on. Some things arent even able to be achived by an army, but by a small group of specialists. Isnt that the plott of nearly every CoD, MoH, Battlefield, there is? Ok, destroying some heaters sounds lame to beginn with, but maybe it´s just a decoy of another group beeing even more covert ops. Or it´s one step to achive the main goal of your mission. Actually I see this way less problematic in terms of "fluff logic" than 50 Grey Knight Space Marinez bashing heads with a handful of bugs on an area the sice of a footballfield And humans beeing humans whilest in mortal peril by an outside force and still pissing at each others feet is the most human thing there is. Imagine humanity gets rid of the CA and you are not the one with the best outcome? Unthinkable.
Also, if we consider things in the grander scheme of things, the actions our lists are taking could just be a microcosm of a larger battle. I mean, the abstracted board would be only a few city blocks, at most, in the real world. A squad or two having a specific objective in that small battle space, with others doing the same thing replicated on a grand scale? Makes sense.
It happens to be that there is a quite succesful online game out there called League of Legends in which years ago they absolutely decided to decouple the actual game from the lore and fluff of such game because the suspension of disbelief was unbeareable... ... Turned out to be the best thing to ever happen to both the game, the company and their lore and thanks to that you can all enjoy the MASTERPIECE that is Arcane, the Netflix Animated Series. So what does it matter if the Human Sphere is involved in an all-out battle out there in the lore? This game is about anime style blackops in a sci-fi 'hopepunk' game and gets the job done incredible well. Let the Lore do what it has to do, and upcoming amazing content derived from such Lore will come our way... be it an animated series, a spaceship warfare game... or a let's become Tesseum Prospector game
You'll probably find by and large Humanity is united beside one another to defend themselves against the CA. However these fights take years and years and years. Between N3 and N4 it's been what 50-odd years since the start. What Infinity is doing has factions exploit bigger battles as a way to slip into an opponent's defences during the chaos to steal stuff they've been wanting for some time, while giving them a means to conceal any involvement. For example - Morats are attacking a YJ base. PanO is gonna send a clandestine element to infiltrate and steal the very thing YJ is attempting to defend so that 1. YJ doesn't have it any more 2. Morats don't get it.
If we compare with the bad relations between the allies that were fighting against Germany during World War II (all the dirty tricks, such as stealing patents, recovering some key German technologies without sharing them on an equal footing with the other countries, trying to recover territories by invoking great principles but where their purpose is the same,...), we can see that the Human Sphere follows a similar logic of dirty tricks. Somewhere there is a logic. Now, is it well orchestrated in the stories, that's the question. But for the moment the dirty tricks of the powers of the Sphere seem much more damaging than those during the 2nd world war, the EI is advancing dramatically, soon we will end up playing a game with 2 factions, the EI and the human resistants...
There is another possibility, yet hinted in the Fluff with some oblique ideas, that would allow CB to avoid some issues of Lore & Background. . . The Tohaa are a powerful civilization, but based on Intrigue, Deception, Slavery of "Uplifted Servants" and Dirty Maneuvers; like Ithe Human Sphere Nations they seems to be based on the Sci-Fi Literary Tropes of Alien, with Weyland-Yutani Megacorp only interested in Profit and clamoring for Colonial Marines to save their asses when something bad happen (first Xenomorphs, then Nautjya-Yautjia Predators and now even Prometheus-Engineers with Military Grade "Vancian Magitech") but scrambling the Corpos as soon as they can do some Dollaz. . . "Trinomial Illuminati" were able to keep Border Colonies contents and happy when they had to cope with just "Unruly Primitives Refusing To Be Uplifted" (a sad history repeating in the Human Sphere with Varunan Helots and Ariadnan Antipodes) but folded like a Castle Of Cards when the Combined Army military might was unleashed; Makaul Battalions with support of Gorgos Exoframes and Chaksa Heavy-Gunner Servants are apparently the "Heavy Infantry Force" of what We saw of Tohaa Military, the rest is almost all iterations of Stealth Camo Recon Scouts with Sniper Viral Weapons and Toxin Blades, easily countered by Shaasvastii equivalent. . . Planets after Planets of Tohaa Fringe Colonies folded when they were Brute-Forced by Morat Berserker Hordes, Swarms of Gaki-Pretas and Unfeeling Legions of Batroids Unidrons; as happens with Greedy, Corrupted Corporate Masters very probably the Illuminati of the Tohaas escaped from the Colonies leaving Uplifted Servants and "Proletariat Blue-Collar Artichoke Country Bumpkins" to be slaughtered, and this created the Sygmaa Rebellion that now wants to overthrow those Trinomial Spiral Illuminati . . . . . But the Tohaas aren't the ONLY Alien Civilization that oppose the Combined Army, nor the most powerful; is hinted there are in the Galaxy some other Powers that even the Evolved Intelligence fears to thread such as those who enslaved Shaasvastii Miners that mutated into the Jayths or those from whom escaped some Lesser Races hinted in the Combined RPG Manual, Xenotyrannies so despicably hideous that the Refugees thought the harsh, militaristic, autarchic Regime of the EI a veritable paradise if confronted with whom they escaped. . . If Infinity Lore close itself in a Corner, then CB could pull another Deus-Ex-Machina Alien Empire that start to nibble at the heel of the Combined Vanguard Force and they could relieve the pressure on the Human Sphere beleaguered forces, to continue for another "40.000 Years Of Unchanging Grimdark Cosmic Warfare" (the Pun on the Now FINALLY solved Immobilism of WH40K Lore is clearly intended; Corvus Belli Game Lore is far more dynamic and daring, as the Secession Debacle of Japan proved, or deciding to have Kodali and Bit-&-Kiss be "Kerriganized" by the Combined Army). . .
Perhaps you are more versed than me in the Infinity Lore, but I get the feeling that you are mixing up the Tohaa Trinomial (the goverment), the Tohaa Trident (the military) and the Tohaa Triumvirate (the "Illuminaty-like" organization). But as far as I remember they are not the same. The Tohaa Trident also has lots of standard line troopers constantly battling on the frontlines, like the Kamael, Sakiel and Ectros. Troops like the Chaksa Auxiliars are called "auxiliars" because they are just support troops, not the main battleforce.
Right now, I’ll not say no to more aliens. I love scifi genres and aliens are one of the main things that define scifi for me. I hope at some point they revisit the Tohaa and do some more with them. They are very interesting aliens and look cool as well. There are also many new aliens that can show up through Tohaa as well as CA. It would be interesting if a third alien force were to show up as well but I think there’s already plenty to go around.
It would be cool if the Tohaa Trinomial opened a portal to human space again, discovered what the Triumvirate is up to (the whole "messing with T'zenchi digesters, effectively becoming a seeker race to defeat the EI"), and the Tohaa getting into a three-way civil war over it (Trinomial vs Triumvirate vs Trigon). It would be very symmetrical...
