Have you though of adding a player like ror had. being able to walk around and such. adding ragdoll physics and injuries for testing and such. Sorry if this was mentioned before, i havent really found anything about it.
RoR didnt really have this. They just had a crappy figure representing you and I thought it was quite useless since none of the mod vehicles I used even took advantage of it. HOWEVER; We could use a crash test dummy or something like one.
thats what im talking about. or just having a test dummy standing around. Some could be assigned as a type of "ai" it would be better then an empty car. its not that bad but its missing the stig just an idea, since ror had that maybe beamng will have it, but better.
the thing that i am really missing from ror is the ability to drag cars by mouse. it was so much fun in ror