Hmm. I still think you stick with Casey until the team loses more games than it should. As the author notes, this team is still flawed and we need to keep building. Standing pat now and then firing Casey will likely lead to the next guy getting fired a couple years later too. To me it just makes no sense to keep replacing head coaches when the real flaw is in the roster.
While I believe there probably is a better answer out there, currently to me the reality is that "super motivator" guy still isn't going to take this team far, not the way it has been constructed.