I would love to see better physics with interaction between infantry and vehicles. An example is like they did it in the Joint Operations games and Black Hawk Down, those games and the way they did it in that engine. So you can just walk onto a vehicle and have it transport you, not have to get it in. This would be awesome, so instead of ejecting from the back of a plane to parachute, you could get out of your seat, walk to the ramp, lower the ramp, and then jump out yourself.
Example of what I mean from Joint Ops:
In this video you can see what I mean by people sitting in the vehicle and being able to move around while it is flying. None of that glitchy stuff