Hey blovski I'll try to throw in my 2 cents on how to combat ostruppen, although I am not the greatest sov player.
On building heavy maps get the heavy doctrine mortar, great vs buildings (quick flamer for super early game/molotovs). I have a more general idea on how to combat ostruppen however. Since you know you don't have as much capping power, secure one side of the map as best you can then start being offensive. That means massing your forces around 1 fuel and 1 muni.
If he is getting ostruppen you know he is most likely going fast t2 so either go guard doctrine to combat the scout cars and flamers OR what I do is get at nades and the shock troop doctrine. I want to combat those pgrens best I can, and at nade gives me some defense against t2 germ vehicles. I also build the at gun,mortar, and mg building.
So say I do lose my map control and his tanks are out before mine (which is always the case for me) I can buy time defensively until I get tanks, getting t34 or su85 entirely up to you.
Sometimes I win sometimes I lose, but my outcomes are not based on an OP doctrine. I will agree that increasing cool down on call-in would be nice.
