I think what we are seeing here in a nutshell is some immaturity, which should be expected of college-aged kids.
At some point, he probably got it in his head that it was an affront to him to have him on the bench in crunch time, and, that Fran was going to reduce his minutes due to the additions of Patrick and Frederick. Maybe his family or perhaps his friends, but, at that age people are highly impressionable and impulsive.
Is that perception accurate? Maybe. Maybe not. My guess is that Patrick will primarily play at the three and will have very limited minutes as his body catches up with his skill set, so I don't think his addition would have had a significant effect on Moss. CJF? Hard to say. He's intriguing but a complete unknown.
As others have pointed out, the problem is that wherever he goes, he's going to have competition, and, the competition from an athletic standpoint is higher at KU than at Iowa. It will be interesting to see how this plays out, but, ironically, he'll likely end up playing far fewer minutes at Kansas than he would have had he stayed at Iowa.