Never coached at the college level, but coached many years of travel ball and H.S. ball. Athletes, like all humans, resist change, particularly if there is turmoil associated with change. Clint came into a program that previously had low expectations and rapidly taught the players how to win. He EXPECTED them to win, and convinced THEM to expect to win. He was a genius, the players immediately bought in to his coaching style, and the players were hungry for success. Dean came into a program that had become accustomed to winning, and winning big games. There was turmoil on the team because of the situation with Corey and the departure of Clint. Dean has a different approach to the game, does not have the name recognition or the "it" factor of Myers in the sport, and has not yet shown the ability to "connect" with the players. He may turn into a great asset for the program, or he may not. Let's face it, JMU is not in the same universe as the SEC in sports competition Hopefully he is a fast learner and a better communicator than he has shown so far. Unless/until he gets the support of the players by demonstrating that he knows what he is doing, and having them trust that he knows what he is doing, the program will continue to spiral into mediocrity.
Examples: Carlson often shaking her head at Dean's pitch calling sequence during the regionals. Martin seemed, via her body language, lost and frustrated by the end of the season. Both are premiere pitchers, and Dean is supposed to be a pitching guru. The point is, I don't think that he ever gained their trust, regardless of what they may have said in interviews or what commentators might have said. If players don't trust and respect the knowledge of their coaches, seasons seldom turn out well.