Here are my ideas:
1. Better jet sounds
2. Stock aircraft ideas: Comp ARF SuperXtra, Comp ARF Flash, GP 1/3 Eagle 580, Reactor 1.60/50cc, Skyraider Mach 1 (for newbies)
3. Engine sound list: DA50, Jetcat P-120, Moki 400
4. Realistic stress factor on planes and helis.
5. Crash effects: Covering...