The biggest point of contention for me is the car handling. The cars were a little too floaty in GTA4 but just a little. All they need is a little tweaik. If R* went too far and made the cars too arcadey I'm going to be PISSED.
XBL Gamertag: JWRebholz
PSN ID: jwrebholz
...No, I'm not very creative when it comes to this sort of thing.