The reasons I don't fly in the AvA are 1) I warp like crazy in there. For some reason there is ussually a lot more detail in there. and 2) There's just not many people in there.
I agree that it could and should be the focal point of the online game. I think what they need to do is make it progress like the real war. Start in May 1940 (or something) and take us through every day of the war, changing the maps slightly as time passes. Maybe make it so that 1 hour of game time = 1 day historical time. I think it would be enormously popular.
As an ancillary idea, have each pilot get a new number attached to his game ID each time he dies. So if I fly my first five missions and get 8 kills, but then die: Sommers [1] would be done with and now I would be flying as Sommers [2]. At the end of the war the winners are those who scored the best on a given #.