I'm with K - Buford, to me, was pretty clearly one of the best 5 OL we had. What his position should have been is certainly up for debate but I thought he played pretty solidly whenever he was in the lineup. Flax was a disappointment. As said above, lots of false starts but also his lack of lateral quickness resulted in a ton of sacks, hurries and hits on Levis. Just plain not able to get wide enough to engage the speed rushers. Straight ahead blocking he did an adequate job. Pass pro was a crapshoot.
I'm not with K re: Burton. He definitely struggled mightily up until either the Vandy or Georgia game. While not a difference maker, he performed much better against both of those two teams (not saying he didn't get whipped every so often, of course, but every OL does get beat periodically). I watched him quite a bit against UofL and I though her performed very solidly. Lot of running room when we ran in his gaps. I'm sure he missed a block here and there but I thought he definitely showed some flashes of significant improvement the last 3 games.
The jury is still very much out on Rodriguez, Goodwin, Young, Bingham, Wohlabaugh, et al. Haven't seen enough of them to make any sort of judgment. I'd really like to see Cox and Horsey rotate back to their natural positions and see if we have anyone who can play C to allow Cox to shine at OG again. He, too, showed some signs of improvement late in the season so I'm not necessarily saying he HAS to move back to guard. I want the best 5 OL starting with 2-3 solid contributors subbing throughout the game.
All of the OL need more strength, better footwork, and an increased 'nasty' streak, which was sorely missing too many games this year.