@olive hemlock more about missiles and flares:
for missiles that have proximity fuse (most do), they don't need to hit the plane to explode. there might be some that don't have proxy fuse, though, especially if a level gets added some other time with F-4 and MiG-19 (some other licensing)
also, just because a missile goes for flares doesn't mean it's not active - if some poor fellowe happens to fly behind the flares and the missile flies through and tracks them instead or simply explodes by proxy fuse, the damage should still be dealt.
and for flares, I think it would be nice if they worked similar to weapons in the sense that you have a certain amount before reloading. so it might say "8 FLR" and each time you press F it shoots a pair of flares. Holding F dumps them. Then, they reload with a time count, like everything else.
This way, you could give realistic balance to planes like A-10, which would carry more flares than Mirage.
Somehow, you would need a basic formula that figures out what the missile will track based on how far its infared can see, how many flares, strength of engine, etc.
And missiles should have a certain damage that varies on how far away the victim is from the explosion, so not neccesarily instakills for all things.
EDIT: oh and finally I couldn't find any J-7s with a blue paintjob so I think another pretty paintjob is dark brown like in the Myanmar Air Force