IMO Prohm's failing hasn't been his inability to bring in NBA caliber recruits. It is his inability to sign the next tier of player. And keep them at ISU for 4 years. Personally, I would rather have a roster full of guys who at best end up being overseas professional players. I will take program foundational players like Vroman, Homan, Sullivan, Stinson, Clarke, Gilstrap, Garrett, Ejim, Kane, Hogue, etc. over NBA caliber players.
It is a fine line, because every good HS player has a dream to play in the NBA. But not every player has the patience or work ethic to develop into a solid college player before making the NBA jump.
Prohm has done a great job of attracting top HS talent like: Wigginton, Horton Tucker, Foster & Hunter (I excluded Halliburton because his development into an NBA player within 2 years was a freak occurrance). Where he has struggled is to bring in 3 & 4 star recruits that develop into very good college players and stick around 3-4 years.
For ISU to be a perennial NCAA Tournament team we need those foundational players and then kids like Wigginton, Horton-Tucker, Foster and Hunter can be sprinkled in. If they are ready for a big role from day 1- awesome. If they need so time to develop- then they can fit a valuable role. IMO guys like Morris and Halliburton benefited from such roles.