I am making a lot of suggestions that I am not sure are even possible....but here goes....
I don't like how you can figure out that someone is trying to asault your base if you notice an empty moving vehicle appear near you on your minimap. (i.e a guy just jumped out of a jeep).
Ideally we would still want empty vehicles to show up so you know when they spawn.
I think a good idea would be to make it so only friendly empty vehicles show up on your minimap.
Or possible to make it so that empty vehicles only show up on the minimap if they have NEVER been used.