Plus COH2 won't have symmetrical maps so hypothetical mirror match will be totally fucked and lose any kind of sense because map balance, you heard it here first.
Actually I think they said somewhere that they were going to make some more symetrical maps for competitive play.
A lot of CoH's charm came from the forced asymmetries and still the more symmetrical games (rax vs Volksspam or standard wehr t1 against wsc starts) were usually a lot less fun to play. I guess it's worth testing mirror matches in the alpha and beta, but the focus should be on wehr vs soviets. I can only see mirrormatches working in games that put much more focus on economy and teching.