Even a fraction of a second of invulnerability exiting a vehicle would be nice. I'm constantly getting weapon-locked because people jump out of my sunderers while I'm moving full speed and somehow get run over by me. Also, if I deploy on a steep incline, people will run up to resupply and spawn a bit too close to a wheel and get damaged by it even if it's parked.
Most of the watchtowers have the spawn dump people right into the room with the main control point. Gotta camp the room to cap the point, but now will only be getting a fraction of the xp the defenders will be earning.