Sniffer+/Sniffer2.0 : As soon as Camo Marker unit enter's it's ZoC it loses the camo state. Works both on active/reactive turns.
I think I'd make that a Sensor 2.0 rather than a new Sniffer. And give a free Sensor activation any time a Camo marker activates within or moves into Sensor area.
Some kind of Sensor mines or repeaters deployed via pitcher would be a good way to counter camospam without actually making camo entirely pointless.
A likely unpopular opinion: I think anything other than MSV3 that completely ignores Camo is going to be hideously OP vs Haqq and Ariadna. I'd rather some piece of high tech that negates (as opposed to detect) other high tech: ODD, Mimetism, T/O. Basically like an optic disruption negation field instead of a sensory array. A portable, deployable/pitchable disruption device. If you're just wearing a ghille suit or a camo pattern then you're still fine. Also I feel something like this should effect impersonation-L2. I can't think of a fluffy reason why it would effect one IMP level and not the other but in terms of game balance, it doesn't punish fidays and ninjas EXCESSIVELY while also buying the user some protection against KHD impersonators.
If PanOceania came equipped with the ability to deploy Sensor into the midfield easily I might agree, but as it is we have to risk our best order assets to put out a Sniffer net. Still, it's very unlikely to happen.
