Say what you will about the players not being up to par (that's also at least partially Cosh's fault), but the real problem has to be at least partially due to scheme and play calling. Go back and look at the stats from 2009 when Vic was the actual D Cord. The players were equally shitty, if not worse. The offense wasn't eating up 40 min per game. Yet, the defense still wasn't letting every team in the confy set records (2010 everyone set rushing records on us, 2011 it's passing records).
People seem to think that Cosh is doing what he can with what he's got, but I think he's just bad at his job.