It would be cool if there was a visual cheat that makes the lines at the tips of the car's wings also appear when the wings aren't in use while driving or during gripflight and if that cheat would also apply for ghosts.
Seeing trails behind ghosts and other players would tell you where they were a second before and would just look awesome.

I think it would be a good idea to make this cheat unlock with the Gounded Departure achievement which you get for finishing Entanglement without wings.