If Kevin Mawae was trash last year, then I don't know what word would describe the interior line this year. Point is, Mawae is a much better player than Eugene Amano and made that line better.
The Titans' offensive line was once ranked the worst in football in regards to run blocking this year. If you would actually watch a game, you'd see why. Amano gets blown up right after the snap 80% of the time, Jake Scott lets defensive tackles slide right by him, Leroy Harris commits about two holding calls a game, David Stewart has been mediocre and Michael Roos has been trash. Part of that is because of the 8-9 fronts that CJ sees almost every play, but the offensive line is that bad this year. I seriously don't think the Vikings have the same problems.
I just don't know how you can say AP "re-established" himself as the top back when his stats are similar to CJ's. He's not outplaying him much, if at all like Johnson did last season after 2000+ rushing yards and the all-purpose yard record. When AP goes out and has a clear superior season over Johnson, then you can "re-establish" him as the NFL's best back, McShay.