I think he was terrible when he started. Arrogant and with little feeling for the game. The Nathan incident seemed to teach him a little humility and made him a much better ref, but over time he seems to have reverted.
To me he is pedentic, and unable to see past his own initial assumption regardless of new information. I rarely enjoy watching him ref.
However he does get to ref both teams, so it works out fair, if not enjoyable.