@jacobg I think that makes airplanes too vulnerable. You would need to make them cheaper.
Cheaper airplanes and more effective AA might well be more realistic, but be careful about shifting the balance.
This
http://www.soldatinionline.it/Forum/Novita-dal-mercato/7832-Refinalmente-Savoia-cavalleria.html#7832
reminded me of a unit type not previously seen in A&A.
I’ve often considered Cossack cavalry for both sides on the Eastern Front, but the new mech inf seem to have taken their potential niche (i.e. a low cost move 2 unit).
http://www.plasticsoldierreview.com/Review.aspx?id=421
http://en.wikipedia.org/wiki/1_Cavalry_Division_Eugenio_di_Savoia
i have a box of revel cossacks,but the plastic is very soft,and my games workshop paint keeps flakeing off.you could replace the soviet mech piece with calvery,for a bit of flavor,im not a big fan of their mech piece.
check out the best 1/72 sets ever,i have been collecting a long time
http://www.plasticsoldierreview.com/Review.aspx?id=822
http://www.plasticsoldierreview.com/Review.aspx?id=776