When Doug Nussmeier came to Ann Arbor he left a few things back in Alabama: his family, warmer weather and a national championship quality team.
In Ann Arbor he got a few extra dollars, a 5th year QB and an offensive line with a combined 31 starts. SB Nation did a very nice piece on what to expect from a Coach Nuss offensive vs. a Big Al offense. I have taken a few excerpts from the article but I recommend you read the entire thing. It's very detailed and starts to answer why our 5 star offensive lineman struggled last year under Big Al:
Borges' run game for his baby-faced interior line involved those two schemes plus four others. That's a lot of footwork, technique, and reads for the players to master in any of those concepts. Consequently, the Michigan run game faltered and often failed to set up the team for play action. In fact, Devin Gardner frequently executed a play-fake to the running back only to turn and find not a wide open receiver in his sight lines, but several defenders in his face.