I really don't think there has been any reporting so far that gives any clear insight into the team's locker room defects. We can only look at this from the outside and guess. The reports so far are vague.
I must say I've been surprised at how the season has gone so far. This was a team with too many individual expectations. I always assumed Stevens would pick certain players and leave out some others, because when you have an incomplete a role, it makes it tough to a player to perform and improve. I expected Morris to get limited minutes. I expected a competition with Smart and Rozier, with only one getting minutes. I did not expect Stevens to try to play everyone. That alone seems to be enough to make this an awkward group.
Is Morris right? Possibly. He also could be facing the fact that he played the best two months of his career, and got a starting job on a very good team, and now is regressing back to the mean. At the same time, a more talented and younger player had a bad start, and now is playing up to his abilities, and will inevitably take Morris's job back soon.