As I understand it the Eastern front was almost totally ground support; most engagements were below 10,000'. Among other things this would explain why the Russiam aircraft are so effective down low.
When you think about it the MA is more like the eastern front than the western.
I wonder how well the Jug drivers doing JABO work would have done. I can see were a pilot who is accostomed to escort duty at 25,000 feet would be out of his element.