"The vehicle damage currently has an absolute minimum of 2x more DPS than any Weapon available in game" They have a higher survivability than any runner in game has that goes hand in hand with the extra damage making it overpowered.
These vehicles also require 2 people to use, they should do more dmg as your taking 2 foot soldiers away. The exceptions being the trike & assault gliders which leaves the driver super vunerable and only able to shoot in a small cone infront.
--------------------------------------------------------------------------------------------------------------------- - Check out the new NeoFragger killboard here