Nerfed Tiger I?
I did a bit of experimenting in Dukla Pass (coop), replacing the German armor by StuGs and most of the Soviet armor by IS-2, ISU-152 and T-34-85 late. Suprisingly, the bots could deploy StuGs quite well against the Red tanks, me being mostly an observer. Also, the tank riders weren't that keen to abandon the vehicle even after half critical hits.
Out of curiosity, I decided to replace StuGs with Tiger I and things soon turned sour for the Germans - bots being unable to handle the tanks properly, turning the rear towards the enemy and getting stuck on the smallest obstaces. But most of all, the Tiger's 88 seemed quite limp in comparasion to the StuK 40 resulting in numerous deflected shots even from the flank.