Run blocking was only a problem for the OL in Carolina, and that was because they were trying out a bunch of pulls/trap stuff that we don't really have the personnel for yet (namely, Carp sucked at pulling). Since then, Seattle has run blocked pretty well but has been undone by a very poor lead blocker in Coleman. When Coleman's been off the field, Seattle has run the ball well.
But, if I am going to blame anyone on our OL, I'd say that Unger's dropoff in performance has been a difference maker. He looked terrific in the preseason so I'm wondering if it is just a recent injury he's been concealing. Sweezy and Giacomini have looked pretty good. McQuistan has been reasonably decent when not facing Aldon Smith. Okung was playing at his usual level until he got hurt. Carp has improved after a very rough start in Carolina.
We also face three of the NFL's very best front sevens in the first four weeks, with the other remaining team being coached by a guy who knows our team inside and out. Quality of opponent is just as important as the quality of the Seahawks. And yet most people completely breeze over it.
