Great update. Amazing work so far.
One word of caution: in Barbarossa, the major trouble is supply. Beware of supply-hungry divisions (like ARM and MEC) and prefer good ole infantry units. If you have the manpower, of course. As Germany I usually tech rush agriculture so that I have a good supply of troops. The SU is large, but not *that* large and if they didn't focus on agriculture, you can win an attrition war on the eastern front.