I am sure the flames will follow but as I replied in another thread, food for thought...
Unlike the in real world (I know this is a game), you can aim and fire the main gun from the turret top, cupola. I think the Main gun should be limited so that it can be "fired" through gun sight only, you could still traverse and elevate the main gun from the cupola (as per giving the gunner directions). in addition, the cupola view/machine gunner view still would be used for spotting and/or driving (again as in giving commands to the driver). Do that, and tanking gets much more realistic and most of that dot painted on the screen shooting on the fly/over hills goes away and it becomes more like a sim and less like a 3rd person shooter. Furthermore it is extremely hard to see a plane though that (main gun) sight, unless you know right where to look. Not to mention difficult to track and much more, to shoot it. That should make "main gunning" planes more similar to the real life application, more luck than "skill"
Most of those "incredible" shots (in game) come for being able to see more and therefore be able to lead and shoot (red dot) better than what would have been available in a WWII tank