I think there are some gread scenarios not yet really explored:
- Mediterranian (some was possible in IL2 but just a little)
- The Battle of France (there had been some fighting even if it was not as intense as during BoB and there had been a lot of ground ops from both sides)
- Early Pacific
But although I never really warmed up to Soviet planes I understand their move. Let's be honest: It was the Russian market that kept IL2 going I would say and the community there is perhaps as big as all the rest combined (ok here I am just guessing

but during the years I learned that there has been a more constant and overall serious passion for this game in Russia). But anyhow they need to fix the things first.