I think it's stupid to replace a coach (any coach) part way through a season, it should be done at the end (or before it starts). Players shouldn't have to go through that.
I think he made the right decision. Only he knows when the time is right and that may happen at any time during a season. I think he did really well with the limited talent he had at his disposal. Pity Wallace could not do as well while he had a chance at Richmond.