Good question (about UGA). The offensive line was considered the weak spot, and they have played well overall, better than I expected. The 2016 edition was heavily weakened by bad OL play, really bad. They obviously have NFL caliber running backs, which is good, and a really stout defense, among the best I've seen at UGA. They fly to the ball and mostly play disciplined. The secondary at times has been had and could be vulnerable against a good team. Special teams, usually a weak spot under Richt, has improved to be somewhat better than average, and that also has helped. A lot.
UGA made a LOT of mistakes against ND and still won, so there is that. That game might not have been close with a cleaner game. ND had all kinds of problems on offense against that defense but got bailed out by some silly penalties at times.
The other weakness I see is that this team is so run heavy on offense. They have not had to pass much (except against Missouri oddly enough) and they haven't. Defenses have done the obvious and loaded up to stop the run, but if Michel or Chubb get past the LOS they are a load, and Michel made Florida pay for playing 8 in the box. The freshman RB Swift is showing enormous promise and is ahead of two very good sophs at RB, and they have two of the three top RBs committed for next season.
So, if your secondary can handle man coverage and your LBs are smart and fast, you probably can slow their rushing attack and then force Fromm (true freshman QB) to beat you throwing it.
In summary, they are a very solid hungry talented team that can be beaten with the right defense and an mobile QB who can pass (think Barrett for example perhaps). Thus far, they have won most of their games early in blow outs and simply run clock effectively without much need to pass. That won't work against elite defenses. I wouldn't discount the win at ND though. ND has beaten some good teams, and that was the first start by a true freshman QB (Jake Fromm State Farm is his name now) who managed the game, but obviously has far more experience now and is pretty effective throwing the ball.
I read that Alabama would be a 6 point favorite over UGA right now. I suspect Ohio State would be 3-4 point favorites and perhaps Penn State as well and Clemson. But they are in the hunt obviously. Their LBs stack up well against about anyone.