No, I can think of several other explanations (all of which I don't agree with, but none of which have to do with cost-cutting). All but the last survives Occam:
1. No replacement in mind.
2. Adams scared to fire a coach because he's new at his job.
3. What the kids call "optics"; how many coaches is this team to go through?
4. Players not named Skinner reportedly like him.
5. He is, of course, a Svengali.