It's a bit early, but I can see the idea.
Fix the camera more to the plane, I often turn and the camera doesn't follow it at all. I would also like gamepad support. Some additional UI for bullet prediction, it's hard to describe what I mean, but in a few other flight games, when you're locked on to an enemy there's usually a little circle or something on the UI that gives an indication of where you should be aiming to hit your target.