I am going to attempt to change gears here a bit and not argue the difference Gurley would have made last year. No matter who was in that game, GT was going to refuse to lose!
Simply put, UGa every year seems to have a superior running back and a some very good backs behind them in waiting. Many of them surely could have been nearly as good as Herschel in stats anyway, but they all seem to have a curious self destruct button.
I would say since Herschel, they have had 6-8 RBs with serious big time potential. They get hurt, steal something, break the rules, go pro before they reach their potential, get a case of the pouts because of the new "Next Herschel" etc.
Gurley was a damn fine RB. He was devastating, but he made as much impact on their overall program as any one of 10 backs that they have had in recent decades.
Nobody wastes talent like the Dawgs in the last 3 decades. It's not that they haven't been good, but you give some of today's coaches the talent that they have had over the last 30 years -and you might be looking at 3-4 MNC's.