I don't quite share the same level of pessimism that you do, but I completely understand. A couple things.
One, I will be very interested to see how Freeman handles this stage. Does he have his guys ready to play and do we come out firing away, not playing scared to lose? That was Kelly's MO in big games and we almost always got embarrassed unless the game plan was perfect. I fully expect a different kind of Irish team in this game.
Leonard could very well be the X factor. I think its pretty well established the UGA struggled against mobile QB's so I expect them to exploit this through out the game. At the very least, to keep UGA honest, but we could see Leonard rack up decent yardage on the ground. Move the chains... thats the name of the game against them. I don't think we'll see us be able to run right at their defense with much success. I think spreading them out and forcing them to tackle in space is very important. This defense had some issues tackling in space.
Defensively... yeah... I think we'll be holding on for dear life unless these guys play out of their mind and surprise me. We had a phenominal defensive season but man... you can only take so many hits and lost personnel before its evident. Hope i'm wrong there.
I still see a 27-17 type win for UGA. Ha, I still have terrible PTSD from past big games like this. I was fooled into thinking past teams were good enough to play toe to toe with Bama, Clemson, etc and I was wrong... very very wrong.. lol.