I agree. I don't think Calipari is a bad bench coach. I just think he's very average. He has his one style that he likes to run, and if you find a way to stop it, he struggles to make an adjustment. Part of that may be due to the fact that he's had teams that are so much more talented than his typical opposition (CUSA), that it didn't matter what opposing coaches did, they couldn't slow Memphis down. In the SEC, he'll still land a ton of talent, and he'll still put together good teams, but he'll find the going a lot rougher, because there will be teams that have enough athletes and good enough coaching to stop him.
Missouri is a good example this year. They had a style and gameplan that countered Memphis well. In no way did they have the more talented team, but Calipari was unable to adjust to stop what Missouri was doing.
He's decent as a bench coach. He's just not great, and he'll be middle of the road in the SEC as far as pure coaching ability. Fortunately for him, he'll be near the top in talent, because he plays the recruiting game so well.