Go figure...steelers offensive line production has been almost the exact same as last season, and in fact slightly better this year according to football outsiders. Keep using the O-line and injuries as the scape goat.
http://footballoutsiders.com/stats/ol
Pit 2010 19th in run blocking and 29th in pass protection
Pit 2011 18th in run blockng and 27th in pass protection
How much stock you want to put in that is debatable, but thats the best O-line stats that I can find, and so far, theres been little to no change in production based on that.