I'd like to see:
-avenger and kate pits

perhaps even Devastator (I luv that crate

)
-a few trainer airplanes
-more l0adouts (for 109s etc.)
-campaign files decyphered

so you can edit 'em(
how many times I've been screwed by crashing campaign I don't know)
-bomber sniper aces tuned severely down
-better default campaigns (more interesting without that much repetitive missions)
-boosted FW-190A4, boosted P-51D, boosted Tempest (
does not require any new visual modeling)
-all planes flyable in open pit settings!
-more interaction with the game devs, regular or semi-regular updates (IL-2, SoW)
Sure I can think of more just now right now..............