I'm not saying it would be easy and that there's not things needed more, but it also wouldn't be impossible.
As far as unrealistic skins, I'm also not saying allow a squadron to fly the Richard Simmons La-7. Just instead of being a historical aircraft, it has to be a historical SCHEME:
IE, correct camoflage patterns and colors, national insignia placement and colors, etc. However squadron insignia and placement, nose art, MoDex numbers, etc.