I disagree with this. Heavy Infantry were never perfect during any point in N3, without some means of mitigating their problems - and one way to handle problems is simply to give a discount, meaning Frenzy HI with their fairly heavy discounts (and its easy to avoid drawback). As soon as you start getting enough Heavy Infantry that anti-HI tactics become shooting fish in a barrel the problems become apparent. Running a Yan Huo or a Kriza doesn't mean you'll get to the fish-barrel problem and these two in particular will be able to avoid exposure due to their preferred engagement ranges. Or if we put it in terms of "money", having a force that's disadvantaged by 5 points isn't huge (let's just ballpark E/M and Hackable vulnerabilities at that in the current environment). When your force starts being disadvantaged by 40-50 points you're going to notice it, and you're forced to use units that are forced to be exposed to those vulnerabilities... Footnote: a Frenzy HI doesn't mean automatically beneficial. What's a solo Boarding Shotgun Riot Grrl going to do?