imagine playing battlefield 2142, but all the vehicles had weapons that were 1 shot kills in splash alone, with 3 or 4x the fire rate in some cases, , and the vehicles themselves had about 5 times more health, usually moved to 2 or 3 times faster, there's about 2x as many vehicles running around, and the evironments are more wide open. Also the nearest friendly infantryman is probably on the other side of the map waiting for a vehicle to be spawned, because being on foot is a death sentence. oh yeah and nukes are constantly going off.
Because thats what playing mwll would be like if you had to play as a PBI, instead of a dude in power armor.