Correct me if I'm wrong, but as it stands, Bridges and Deans both hold the title of "Assistant coach", and surely Zane would want to at least be made an assistant if he were to be demoted.

If a new coach is brought in, then at least one of Deans, Bridges, or Zane needs to be sacked, probably more. That's not even taking into account the fact that a new coach might want his own assistant.