Mag was not ready early. So what? Kanon was ok enough vs weak non-conference opponents.
But. He got beat out. And you might notice that he was not the 1st guy off the bench after that either.
BYU basically made its magical run nearly entirely without Catchings.
Catchings is soft. He can fix that with experience like most young players do. And he is a liability in defense. He can fix that with effort and experience.
Here or elsewhere.