What purpose are they supposed to serve in Halo 4? With the exception of Mantis suppression and Gauss Hog sniping of course. Anything else is rendered moot by the fact that anyone with two functioning brain cells to rub together is going to have a DMR+Plasma Pistol+Plasma Grenade class for maps with vehicles making them utterly useless because you’ll be stuck, disabled and DMR’d to hell and back before you can hit 88 MPH.
Even then the Mantis and Gauss hog are fairly useless. Add in that people can get SPARTAN Lasers, Rockets and Snipers from Ordnance and vehicles are essentially screaming metal deathtraps now.
Vehicles are supposed to be dangerous forces multipliers…not liabilities and multi-kills waiting to happen.