I'd like to see more flyable aircraft, even if they are older types such as Mig 27, SU 17, F4 Phantom or the Tornado. Also more maps; Korea, Bering Straits or Germany and USSR border for a possible cold war gone hot scenario.
The more objects, maps or planes we get, the more varied missions or campaigns will be. I think this maybe one of the reasons IL2 is still going strong, one only has to look in hypperlobby to see how many people are still playing it after all this time.