The other schools sufficiently downgraded their educational mission, and they did it swiftly enough. About the time this was going down with the bad scores at UConn, Ted Taigen resigned his position, but did not retire. He was a faculty member. I have no idea why he did that, but he was replaced by a professional staffer, not a faculty member. At that point, UConn's scores started rising. Susan Herbst is on record that the changes included mandating 3 short summer classes and intersession classes at Christmas. This keeps the players eligible but does little toward helping them proceed toward a degree. That's good, because there is absolutely nothing in the APR that has anything to do with graduation or graduation rates. Take several short intersession courses (that obviously do not help you advance toward your major) and maintain eligibility. In other words, make college a total sham. Harvard doesn't make its APR score because it doesn't go along with the sham. Neither does Cal Tech. As for UConn, they did it another way under Taigen--a faculty member--and got low scores. They changed under the new director--a non-faculty member--and are getting higher scores. If you think that means things have improved when it comes to academics, you're deluded. Essentially you're arguing that UConn's ability to participate in the NCAA's public relations project was not sufficiently rigorous.
Personally, I prefer the UNC approach where you just make scores up and send them to the NCAA. At least they are being blatantly direct about the whole enterprise.