Nah, come up with something more exciting/ different. Damage and more rockets practically achieve the same goal, just it comes down to personal preference on what people pick. Go for something like a fire dot, or slowing, or even gas.
Anyway, i think it would be better if each unlocked unit only had two t4's instead of three like you suggest. If you go for all three then all three would feel like they needed that extra unlock to be optimal, and you may just not have the unlock points left over, or the resources to fully utilize the T4.
Also, in the end, one of those is going to be the optimal Cali build, another good for other situations (so they can be mixed and matched), while the third just wouldn't synergies well for certain reasons, or wouldn't be as good. Yes three T4's buffing the same unit works for some doctrines, but then they tend to be the ones with a single high cost unit, not two like Armour.
sounds like a Angela Merkel II....
