No, mirrors suck who ever disagreed before!
coh2 unit types of more aggressive then tactical are basically what coh2 should escape - so as well as it is going there - mirrors could be just fine in terms of game play (same as u play wher vs rus or rus vs rus - no difference feels due to lack of more tactical units) if u close the eyes its russians killin' russians wtf!
Tho that would be the major thing for me not to even buy game after trying beta.