Really, that's your thought process? The whole reason they moved him to FB is because THE GUYS BEHIND HIM BEAT HIM OUT. It's not like the coaches just up and decided to move him to FB for the sake of moving him. They moved him because he'd already lost the job!
How could anyone possibly have beaten him out? Kai started the bowl game and then at the start of spring practice he got moved to FB. The coaches moved him because they believed the guys behind him would be better, but nodoby has proven that on the field yet (you know, the one place it matters). They took a proven performer off the field in the name of potential.
I know exactly why they did it. I just don't agree with it.