Make vehicle damage and repairs somewhat "more realistic"
i.e. in real life it only takes 1 Talon to down Little Bird and they can be easily shot down with normal assault rifles, and generally 1 good Talon hit can take down an Apache or Blackhawk (though apparently it can take up to two if its a non critical area)

I think in game the Little Bird should take like 80% damage from the Talon and 100% from the RPG, and the Apache and Transport Heli should take 60% minimum from Talon and 80% from RPG

Tanks should be 2-3 RPG max (each RPG should do like 40% damage min) and maybe 5 grenades (from launcher) to destroy the regular tank and 2 RPG or 3 grenades for Anti Air.

Any tanks that drop below 40% health should be immobilized....and on this note also it shouldn't take more than 1 mine to immobilize a tank or 2 to destroy it.

Regarding the auto repairing of vehicles from inside it should be much slower, like max 1 segments of health bar every 10-15 seconds, and from outside like 1 bar every 2 seconds. Also choppers should have to land to repair fully if they take a direct Talon Hit

I understand that some people like the OP choppers but from playing the game constantly I find that most people (other than the actual pilots or their current squadmates) hate how OP they have become. Literally on Paradise map the other day we had an Apache camping our spawn and 6 people constantly hitting it with Talons, it never even bothered retreating and still couldn't be destroyed and at the end the guy had like 40 kills and 1 death and all game it was only one guy in that chopper lol.

Tanks and Choppers are an important part of the game but shouldn't be the main elements of what is primarily meant to be an infantry game. And really there should also be a limited number to times that an attack chopper or tank can respawn in game, transports, humvees etc should obviously be unlimited