Hoke is re-building Michigan, like Golden is doing at Miami. Hoke has an easier rebuilding job at Michigan in the sense that the culture wasn't totally pussified, the roster wasn't almost in shambles, plus a huge, dark NCAA cloud hanging over their heads. But regardless, it's still a re-building job.
Just because Hoke did well in 2011, is that supposed to mean he was supposed to do better in 2012? That's nonsense. Players graduated, and his "guys" that he brought in through recruiting were only freshman. He still has to get his guys on campus. You can't really judge a coach until he has been on the job for 2-3 years and his recruits are upperclassmen. Obviously some cases are the exception if you totally suck as a coach and it's blatantly obvious. But for coaches like Hoke, and Golden who came into situations where they were being asked to re-build, this season and the following season are judgment years for them.