He wasn't coming back as the Anae we knew, he had something different. I don't think Anae knew what to fully expect from himself either. He couldn't really have his way with the OL being so bad. Aside from breaking in a few offense for everyone, the OL destroyed his confidence in things.
Not saying he'll be the best OC in college football. Far from it. But I think he'll be more comfortable with his own offense this year.