Yeah, you are right about the engine is too old to change everything like that.
Whatever, I don't really like the economic model of Battle of Stalingrad, because I have Rise of Flight and it's annoying that you need to buy the game 2 or 3 times if you want to play on a different account than your brother.
It's just a wish, but what I would like is a complet remake of Il2 1946 with the name of "Il2 Sturmovik" and being made by fans and for fans. Make the same things as IL2 1946 with a lot of free contents, etc. For the moment it's only a wish, but who know, maybe in 5 years
(or in two weeks)