So you'll only play lineman who are locks for the NFL? Pretty harsh standards. Most college teams would only be able to trot out one or two of those guys per year.
As for Filiaga and Carroll, I agree that neither was great, but both were serviceable on what turned out to be a pretty decent unit. Carroll was bad at times early, but I thought he improved as the year went on. Perhaps you disagree. Filiaga was a guy who previously played a lot of snaps for a Michigan team that plays at a very high level. He wouldn't have started this year, but saying he wouldn't have played for most D1 programs is wrong, IMO.