Its been a long long while since CoD players could drive tanks and jeeps in multiplayer, but now with Iron Clad Spec Op, are we likely to see a few vehicles come back in the later multiplayer maps? Would you like to? There are balancing issues but the way I'd imagine them is that they're extremely weak armour 2RPG rounds or 1 LAW (as witnessed in CoD4). Limiting the number of shells from the main cannon and rounds in the .50C on top?
My opinion is leave the drivable vehicle to the BF series. When you start getting into that type of gameplay its best to have destructable environments and very large maps, both of which are key components to Battle Field games.