Stnadardizing all infiltration units to have to upgrade (most likely for free like stormtroopers if balanced) to their weapons and having abilities on cooldown upon spawning would be a good idea
No, that doesn't work, has never worked and will never work.
The only reason it works with Partisans is that they are cheap to spawn just to troll the opponent when is rushing a building.
Nerfing the infiltration to this point for other units was a mistake to begin with.
Instead the idea of investing micro and munition to counter it was perfect and made sense, you secured your rear with demolition charges, mines and burning infrastructure.
The game is getting closer and closer to being an overglorified facebook game with 4 mainline into generalist and td meta and people strive to make doctrines, heavy and elite units even more irrelevant.
Hell, this isn't the game i bought, give me a refund at this point.