Prohm’s problem is that players like THT, Wiggington, Halliburton, etc. leave as fast as they can for the NBA. They probably realize Prohm can’t Coach them up to improve. So move on. One or two year players don’t sustain a program. It is the very good 4 year players that build the foundation unless you are a Kentucky, Duke, or Kansas.
I think some of that is getting two players who jumped out as NBA talents that left early, but some of it is not developing the other players.
There always seemed to be 1-2 players a year in the run with Fred that would make big improvements year to year. We were also constantly sprinkling in can't miss transfers who didn't need to improve because they had already shown themselves to be among the best players in their previous conference (Kane, Clyburn, Shayok).
So you'd have a player like Kane/Clyburn/Shayok coming in who you pencil in their high level of production from the old school, but you'd also have guys like Ejim or Naz or Thomas who would one season become remarkably improved from a previous season.
THT and Tyrese's short time was enough to build around if the other guys make more of those jumps in improvement. Before the injury Tyrese was basically playing the same way he is playing now last year and he's a top 30 guard playing basketball on the planet right now, top 100 overall player in the world with his PER between 40th and 75th in the NBA all season.