I used to think that Wagner was just an okay run blocker but I looked into some numbers and he might be better than what some of us believe. On runs through the right tackle, Wagner ranked 15th, not great but it ranked as our best with runs though the middle/guard, LT, and left end ranking behind. On runs through the right end however, the Ravens were #1 in the league and very effective in that area. I know these numbers might not be a huge deal considering that the Ravens mostly ran it through the middle and began running plays threw the left end more towards the end of the season, but I just think these numbers show that Wagner is pretty effective as a run blocker.
I agree in Williams case to a point, but the guys next to him were completely underwhelming, it would be easier to move on from him if Jernigan and Guy weren't so bad towards the end of the year.
I know Football outsiders catch some criticism, but I don't really have access to a PFF subscription.