The biggest issue we have is Stacy Searels. Searels has mismanaged our young offensive linemen, and he has not developed them either. In fact, I think Donaldson looks worse than he did in high school. Jahair Jones should have never played at UM, but that Searels could not develop the more talented guys behind him to beat him out is an indictment against him as a coach. I feel the same about Mark and Jon with our young QBs. Jarren Williams is the highest rated QB we've had in recent memory. Richt couldn't even work him in late in the season. But I digress. Hillary and Herbert should be at a point where they could have helped us. And Reed and Jones should have gotten snaps also. Diaz worked Jade in this season, and I expect to see more of him against Wisconsin. Reed and Jones are where they started as far as game experience goes.
I also didn't like Gaynor redshirting. We are not talented enough at any position to shelve young players for some later date. If they can help us now, and I believe Gaynor could have, then we need them to play. I feel the same way about Lo and Cam. Glad Cam finally got burn at the end of the season, and I hate Lo got injured. We keep blaming our players when our coaches are holding them back. More years under Searels' tutelage isn't going to make Gaynor any better, but playing experience and getting acclimated to the speed of the game, etc. would have been helpful. Scaife did the best he could in a tough situation, but I think in the future he could be dominant with better coaching.
You mentioned Donaldson, sure after he struggled outside Searels moved him inside, but Donaldson also struggled at Guard late this season. At best, I would call him inconsistent. Take a look at the last four minutes of the Duke game. Our OL play was literally embarrassing - guys lunging, falling down, playing high, etc. Donaldson has had too many snaps to be so inconsistent. Even as a unit the OL was undisciplined, way too many false starts.
So the main issue is with coaching, which is why simply bringing in more talented guys isn't going to fix the problem.