If you aint drivin, youre dyin'

Vehicles aren't OP, they are Godlike.    It is ridiculous that I can run out of ammo, yet vehicles have ammo factories built in!   Must be midgets, um er, oh wait, little people........

They have radar, unlimited ammo, repair bots, unlimited smokes/flares.   Vehicles don't even move any longer.  Since the drone nerf, they camp flags and farm ground.   Even air doesn't bother all that much with vehicles, they're too busy farming ground. 

How to bring vehicles back down to OP mode

Ground

1.   Limited ammo.   No more firing 50 pounders to kill 1 person.  Give them a total of 8. 
2.   Limited ammo.   No more unlimited 50mm or 30 mm.  Just like ground, give them so many reloads
3.   Limited Smokes
4.   Extend Smoke Cooldown
5.   Limited movement when damaged.  If I fire a rocket and hit your starboard treads, you are slowed 33% and have to compensate while driving.
6.   Reduce rocket destruction to 3 (2 for light vehicles)

Small Birds Air

1. 1 rocket destroys a small bird.  8 second warning to allow ejection
2.  Limit rockets to 12
3.  Limit ammo as well
4.  If second rocket hits, the small air blows.
5.  Limit Flares
6.  Extend Flares cooldown

Big Birds same as small, just add 1 more rocket to their equation

Place repair stations on maps and consider them objectives.  Controlling faction gets benefits

What happens in repair station

1.   Vehicle is repaired. 
2.   Vehicle is restocked with rockets, ammo and smokes/flares
3.   Vehicle can leave early but repairs, rockets ammo and flares are restored partially
4.   If objective control is lost during repair, partial repair rules apply

Any player can carry a repair tool as a gadget.  To repair a vehicle, it must not be moving.  

In today's game, vehicles barely move.  They camp and farm ground forces.  They are not even concerned with other vehicles.  ANY rebuttal to remove the GODLIKE!!! ability is nothing more then whining to remain Godlike.  Vehicles are nothing more then ground farming tools for those who dont want to be farmed.

EDIT:  One last thing.  Once you exit the starting zone, you cannot reenter.  If youre in the starting zone and firing out, your ammo does no damage