Most likely not many of these ideas will appear in the game, and some have been brought up in past but hey, its the wishlist so might as well throw some ideas in the pot
1.wing is shot off while the plane is turning sharp or whatever, the plane will snap even more so then it does now (saw that happen in some old WWII gun cam, believe it was an 190).
2.Maybe add some more debris in the explosion of plane, and/or tank (although the turret popping up in air is already pretty cool)
3. I saw this the other day and thought it was be cool, but have wreckage of plane/tank that is dead
4. Add maybe field hospital, not accessible for players but can be destroyed like other extra places that can be such as ammo factories, cities, etc
5. Too high of Gs, pilot can not bail out (agreed with idea brought up in past)
All i can really think of at 3:12AM