Mirror match-up destroy game immersion and turn this game into nothing more than trash. This is the same as making German discover magic and suddenly regain power with favor of Chaos Gods. This game has only little problems remaining.
Peoples immersion won't break for Protos vs Protos or England vs England. Ageof... Serries, Cossacks, Tzar, Rise of Nations and all RTS have mirror matches.
At some point you got to ask yourself as a company: Am I making games for "WW2 nerds" or strategy lovers?
I guess I have to quote from myself again.
I understand It is huge problem for most of the community but I think It is essential to break this "allies vs axis" mentality in community.
No "Faction" are willing to tolerate their weaknesses or admit their OP ways. If two OKW or Soviet people were competing with each other we could talk more serious balance talks or actually achieve It.