- Guys over-corrected to the point of over-thinking.
We saw this last season with Andrew Wiggins. There came a point where Self said he had to let Andrew be Andrew and quit trying to make him a more emotional player. Andrew began playing more and thinking less about how he was playing. We see it repeated with Cliff Alexander. Self is a perfectionist from the Henry Iba School of Perfectionism. Its a hazard of the coaching style that in "coaching'em up" you can foul them up to the point of not being able to do what they ARE good at, too. We are probably near to an admission by Self that Wayne Selden may have to go back to his old shooting form, and quit thinking so much, also.
- Unreported injuries.
This recurs like that feed you posted of Self pounding the advertising board during the OU game. Tyrel Reed goes inexplicably from a 46% trey shooter his junior season to a 38% trey shooter; then it surfaces he needed a bone spur removed surgically from his foot. EJ's outside shooting falls way off his junior season, then we find out he has a shoulder separation. EJ's mobility falls way off his senior year, then we find out he has not recovered from his knee surgery. Kelly struggles early, then we learn he has been wearing a knee wrap hidden under knee lingerie for months. Cliff struggles then we find he has sore legs. Now, Jamari suddenly falls waaaaaaay off from his recent uptick in performance; now we learn he has a hip flexor injury.
Though we live in a probabilistic, even quantum reality, at certain realms, effects still have causes. :-)