In the Mizzou case, a tutor did course work for student athletes. The NCAA did not find that anyone in the administration or coaching staff knew about this until it was discovered and it was promptly reported to the NCAA. It seems like the proper punishment would be to punish those athletes who knowingly participated in this academic fraud, suspending them for a season. Punishing student-athletes who had no part in the violation makes no sense.
Compare this to the UNC case where a bogus course is created with the knowledge and consent of the administration with the sole purpose of giving athletes grades so they could qualify academically and the NCAA says "we can't do anything".
The NCAA seems dead set on destroying whatever remaining credibility they have.