He's certainly not bang average in the context of what he's achieved at Bournemouth. He gets a relatively small club competing in the Prem year in, year out. I would arguably say playing at their full potential, if not beyond that. He's worked miracles there.
However, as someone else said, I think coming here would be a reputation-destroying move. Our expectations and demands are higher, we're perennial under-achievers and under-spenders, and our fans are restless. As soon as our team goes on a bad run, which is always inevitable regardless of the manager, all those insecurities come pouring out and the manager is widely questioned. If he was our new manager, Howe would probably hope he could move on to a bigger job before the wheels come off.