I believe player development is very hard to assign to any one coach, trainer, parent, player, etc.., AJ was a 4 star recruit, who in year 3 had a minor breakthrough and now having a breakthrough year. He has worked his arse off and deserves it. Giorgi hasn’t been here remotely long enough to assign his pleasantly surprising play to BU. Griffin is a guy that has tools, but a coaching staff can indeed mold. DW was a legit 4 star kid, and although he does a lot, this staff needs to coach his offense up!
Mark Smith appears to be doing FAR better under Clownzo than under BU, Finke regressed under BU, KN is regressing. Black had a great year, but he was a 4 star and in his 4th year, his play may have had very little to do with this staff outside of OA.
For me, if you make 3 stars play like 4 stars, or 4’s like 5’s, then you’re seriously developing players. I would expect a staff to have most of their high level recruits be productive, especially by year 4.