There is a reason traffic is forced right after a game. Turn right, drive down half a block and turn left at the light... It isn't that difficult and is not only faster for you... but everyone else in the parking lot.
And if you are rude enough to make everyone wait while you make an ill advised left... You don't have to wait until the Road is 100% clear from Provo Canyon to Provo Town Center to go... any space will do... it isn't that complicated...