Killing planes on the runway is valid, most regard GV spawn-camping valid too, I do not have any opinion of that, but maybe the spawns should be put placed so a 3-5minute drive from front.
As much as I want to stop the bombing from F3 view, killing a fast moving plane with tree-burst I regard as waste of ammo.
I also want to stop shooting from commanders view, to stop the 5-man-in-one system.
Shooting should be done from gunners position.
Killing a Panther shooting with plane 20mms is another thing I want to get rid of -the best I should get is an asst for de-tracking it
Antitank rockets or bomb should do the trick, like in RL. Also instant repair is out in my book, towing tanks with other tanks to spawn-points or safe places, or run back with crew to a safe place or another friendly vehicle, and you don't get captured. It should be very hard to hit crew members beyond 1k.
Most sims do it this way and AH is considered by themselves as a high fidelity sim.