Well, my suggestion maybe sounds unfair for most of people, but I will enable some kind of help for the new players, like a cross with the real place where the bullets are going if you are turning (in the convergence point) or the estimated path, maybe 300 feet for every enemy plane, where you can see where the enemy is going if he keeps the joystik in the same position.
As I said, maybe this sound unfair, but I only will enable this help for players with less than... 20 kills, or with x points, because when you start to play, is very, very difficult (and frustrating) to shoot down a plane, and this help will motivate you to keep playing and learn how the basics of firing is, and the physics in the game in a real enviroment. Because training offline or in the traning arena is so different and boring, that many newbies will left the game.
Just an idea
p.d. sorry for my english