The RB coaching has certainly coached up guys to play better than their rating, but even with good production, most of the high upside guys are now gone. And given the good coaching there, wouldn't it have been even better if the guy they were coaching up was a total stud?
On the OL, this past year was a bit of a disappointment, but aside from that, I don't think the OL has underpreformed their rating and may be part of the reason the RB's outplayed their rating.
WR I agree that some of the higher rated guys haven't totally panned out, but you have to keep going after the special kids. Aside from depth, that was the biggest difference between us and Clemson. Their WR's could make big plays and ours couldn't. I still have hope. Austin could be a Floyd type in the making and Lenzy, Keys or both could add the speed element we were missing.
DL I think your pretty much on target. Same, unfortunately, with QB.