Apart from the fact that vehicles go down in mere seconds when a full squad are accurately shooting it. Far too many people go for headshots on vehicles driving by. Four assault rifles firing into the engine block of a UAZ will take it down in two seconds tops.But it would, as mentioned a few times above. teams in a vehicle just have to keep circling and shooting another team. They can keep healing on the move while the other team has to keep looking for cover. Would give vehicle based squads a massive advantage.