Ok:
Yes, you should be forced to bail from damaged panzers, and kills should be awarded.
Remote spawn points should have a small shed or just a square on the ground that allows a vehicle to RTB there.
Frankly, I don't consider it cheating if someone .efs from a busted tank. It's just irrational to yell "You didn't sit there, immobile and without ammo and wait for for me to blow you up."
Of course, every problem would be solved if, both with planes and tanks, ditches with damage = kill.