@Kafrion: I agree about the crits. They need to happen less freqently and more predictably. Just the other day I destroyed the engine of a PIV with a single AT-nade. As for firepits, I think Joshua's suggestion is good. In addition, tanks should just avoid firepits unless forced to traverse over them.
@Joshua: I thought about what you said about German's gaining cold resistance as well. I honestly don't think that it's required in their design, being the more static and strategic nation, but nevertheless it might become a problem in the latter stages of the game when both sides are scrambling for VPs. My suggestion is to give German units cold resistance with vet. I.e. Vet 2 -25%, Vet 3 -50%.
Also, the upgrade for Russians shouldn't be great coats, simply because it would require too much modeling work (maybe in the future change the model). I'd suggest survival training of some sorts (boy scouts?
) and add an icon somewhere that displays that the upgrade has been purchased.
As for AT, I don't mind the SU76 being used as Arty from the get-go. However, an ATG should be primarily used as AT (this is a design principle), and so I think it's only logical that the arty barrage requires vet 1. It would really help competitive play where every teching mistake counts.