4.- EASIER VEHICLE DRIVING - he he he, I'm sure this one will have positive and negative feedback. When I played BF1942 I loved that I could just jump inside a tank and use it!, actually, in some of the game reviews this was mentioned to be one of the game favorable features. The airplanes, well, they were "ok", a little tough but drivable after all. And then BF Vietnam, choppers!, weeeell they suck! (even the bots have problems with them! :P ), What happened to the idea of "JUMP IN & USE IT"? Honestly if the reader wants to have a really nice experience using choppers, please try Joint Operations.
So as for:
4.1. Land Vehicles - Great and easy to handle, just remember that passenger(s) must be able to shoot from the windows <cough!>jeep<cough!> (yep, once again take a look at JO) and just be carefull with how the vehicles can get stuck on little objects. Tanks get hooked by a small rock or wooden fence? come on!
4.2. Water vehicles - Nice! but also check the collisions code.
4.3. Airplanes - May be, make them more maneuverable (less real-physics) by increasing the air-lift so the plane won't crash by just slowing a little bit and make them slower cause in BF-Vietnam it is hard to stay on the map.
4.4. Chopers - Oh boy!, I just want to fly!, turn left, turn right, strafe, up, down, forward, backward ... Why does it have to be so difficult? ...
... yep, take a look at JO