However, *authenticity* IS where Relic is headed and therefore is a great argument "against mirror"
I’m with Yoink here, Realism aside, mirror matches just feel wrong.
And it opens up a whole can of balance problems. Like Germanys unit X is weak against the Russians but powerful against a fellow German. And because of this the unit X is the only valid option for early game. Does unit X needs to be nerfed to balance the metagame?
Or the synergy of a German-Russian 2v2 against Two Germans. Will it be too powerful like early US/Brit combos?
These are all balance problems which can be avoided by not using missors. They can also be simply ignored, which will be worse (for casual players).
If Mirrors are definetly in then please only basic matches with an option for the host to select weather they are allowed or not (Army selection: free / authentic).