The team has regressed substantially the past couple of years, especially this year. And Otis has accomplished this while paying a fortune; it's old news that the Magic payroll is 5th highest of any sports team in the world. By overpaying for many contracts, he's made it very difficult to improve this current team, and it badly needs to improve or Dwight will leave.
I can't see any reason to keep Otis. This is not a difficult decision.