What I'd like to see is a choice of skins for each plane.
For example, when you pick the Hurri I, you'd have the choice of either the brown/green skin or the desert markings.
Also, different country markings would be nice ie for the P47-D25 players should have the option of either brazilian or american markings, and for the mustangs players should have the option of American/RAF/RCAF markings.