I've got a suggestion for AH, even though I won't be able to fly without 3D (maybe at work...?).
The 3 craft I have *always* felt were missing from previous games such as WarBirds, FighterAce, and in two cases Confirmed Kill (it has 1 of the 3), are all Russian.
These craft, greatly overlooked, are the IL-2 Shturmovik, the Tu-2 and Pe-2 medium bombers.
The Il-2 would be a great ground attack weapon, much like a P39 but much better armored and with a rear gunner.
The Tu-2 and the Pe-2 are similar, in some cases, and are about equivilant to the US B-25.
These would give you more options than US-only craft.
I suppose it would also be nice to have some others, like the Brit Lancs, and that whatitsname lighter bomber (Wellington?). Jap bombers are already in WB, but they really suck, IMO

Not enough defenses, strength, or payload for long missions.
Just some thoughts. And I don't know if any of those are already in the game, or slated for inclusion.
And, a last minute thought: The Liberator!!
Damned tough bomber, it is. Again, not for any specific reason, just for more options than just the buffs.
-Freelancer