It seems almost ridiculous to revisit, but worthwhile to do it.
Jarvis simply stopped recruiting hard, and became disgusted with having to deal with AAU coaches and handlers, many who had their hand out, and all who had a bloated sense of their self worth that college coaches have to contend with.
Roberts was flailing away in "save my job" mode for 3 seasons at least, much like Isaiah Thomas was when he coached the Knicks. In Thomas' case, the result was a salary bloated roster that had to be cleaned up by Donnie Walsh, who did an amazing job doing so. Roberts left Lavin with an entire roster of seniors, which almost guaranteed a collapse in year two of the Lavin regime. He was all in for his final year in terms of saving his job, and the result was a severely imbalanced roster in terms of graduating class.
Lavin simply went for the best players he could recruit, regardless of position, depth, size, or graduating class. Yes, he was able to recruit some pretty impressive talent, but mostly from the larger pool of guards. His last team basically had Chris Obepka and 5 guards in the playing rotation. Talented group, but a recipe for disaster, and after Harrison's injury and Obekpa's suspension, it all went up in smoke, so to speak.
Mullin - Again, the roster simply did not have enough big men to compete at the highest levels. Yes, mostly through transfers, was able to put a pretty talented team on the floor that was even spoken about as a dark horse for the Final Four. They never really recovered fully from Lovett, and that all goes back to bad team construct. Little depth, not enough size, and poor roster management in terms of graduating class, which left CMA with a barren cupboard.
CMA - so far, it appears that CMA is the first guy in the mentioned group who actually knows how to build a sturdy house. We have size, we have depth, and we have a few guards that can play. Of course, what we are missing at this point, is upper echelon talent, but that is something where success builds more success.
On this subject, so far, no question, CMA has built the most balanced and deepest roster, even if overall talent is not as high as some of the other teams mentioned.