I've won all the non-carbon cars and I can't really be bothered to go through the frustration to get my burnout elite license or find all the smashes/billboards/etc, so unless there's a large group of people here who still play and want to do races or freeburn events then not really.
Back on the subject of GTA Online, I'm loving the looks of some of the new cars - the back end of the Turismo reminds me a lot of the Furai, for some reason.
Unfortunately, I still haven't found a way to get onto Online without freezing and R* support is useless, so my only real option is to somehow remotely delete all of my GTA Online characters and start anew (and if I can't do that then I am not going to go through the trouble of creating an entirely new PSN account and switching between that and my current one whenever I want to play a different game so I might as well get rid of GTA V).