Making the ghosting as it works in D/E universal would help a lot without having to change anything. In D/E when you try to punt someone, the game ghosts you and you wreck yourself. If you try to side swipe someone, you get ghosted and you wreck yourself. This is the best deterrent to dirty driving, going full speed into a wall while you target drives on obliviously, you'll soon stop doing it. However as it works now (and always has) you pretty much automatically advance out of SR.E and you can punt people off again.
As a stop gap measure to stop this automatic advancement, SR should be deducted for having to be ghosted. If the game deems your driving so dangerous you need to be ghosted, why doesn't it give you an SR deduction? It's always been, attempt to kill is free, as long as it doesn't succeed, feel free to try again. Deducting SR for spinning out, hitting walls, going wide, cutting corners would already keep a lot of trouble makers out of SR.S.