Most of the players refer to the vehicles as armor or tanks and they're all heavy vehicles. Problem is the American at vehicle will penetrate the hull and kill the driver with the first shot. The vehicle being disabled or damaged in one hit from a rocket isn't unreasonable but the whole crew being decimated instantly is a bit unrealistic in such a vehicle. I am actually surprised you disagree with everything else, you must not have a lot of hours in the game yet. Especially if you don't agree with the first one, I made that number one as I find it to be of the most importance. In Everton there's an mob location that's up hill exit on both sides and one side the supply trucks can't make it up the road you must navigate at an angle and/or through the woods to get up the road. These vehicle in reality have immense torque and while they would be slow they would never roll backwards while driving forward up a hill. They may slide if traction is lost but on the compacted dirt road they should be able to climb fairly easily at low speeds.