It's interesting to me that he doesn't seem to be recruiting as many 1-and-dones. Or maybe he is, and he isn't getting them. He seems to be getting more guys who stay multiple years and develop a little more. ...
It may also be part of the church-school culture at Nova. It seems like they're more for getting kids an education than to be a way stop on the road to the NBA (what a concept for a university, huh). Of all the one-and-dones on this list
https://theundefeated.com/features/all-the-nba-drafts-one... /, the only ones from a private school are from Duke. There may have been others who opted for the draft and didn't make it.
Accoridng to 247 Villanova offered the following one-and-dones since 2014:
2017: Mo Bamba, Collin Sexton, Trevon Duval, Kevin Knox
2015: Isaiah Briscoe, Donovan Mitchell (2 years), Thomas Bryant (2 years)
2014: Karl Anthony Towns
I doubt there are very many (if any) coaches that would turn down a one-and-done. Most of them just get out-bid by the Duke's and Kentucky's of the world.
Also one-and-done might be more likely to go to a Kentucky or a Duke where half the team has cleared out from the previous year, as opposed to Villanova where they might have to sit behind a talented upperclassman.