The problem, Elephant, is that he also called the sweep right with Portis in his own EndZone, the halfback option by Portis and the 4th and goal early vs. Detroit. A few great plays are wonderful but you have to look at the whole picture and recently that picture isn't so rosy.
Now, having said that, I would be letting the Coach run the team the way he wants to and if that means he is the play caller then so be it. At this point, it makes little difference who the play caller is, I doubt this team wins more than 4 games and that is possibly stretching it. I'd give him the rope and let him figure out if he is going to hang or swing.