As of last season, Kipper Nichols was listed as one inch shorter and five pounds lighter than Leron Black, and he wound up blocking more shots in far fewer minutes. (He also blocked more shots than Finke.) Those are not material differences.
Contesting shots isn't really what we do. One thing Black, and particularly Finke actually did not terribly was take charges. It's a get a steal, take a charge, or give up a layup type defense.
Playing the way we play, we're always going to be at the extreme in three stats: turnovers forced, fouls committed, and field goal percentage defense. That's the mix that will define our defensive success.
We were 5th nationally in turnovers forced last year, 339th in fouls committed, and 313th in FG% defense. The route to greater success is in improving in FG% defense while keeping the other stuff stable, that's where WVU is. But if you lose some of those turnovers to fouls and decline in FG%, then you get even worse. The idea that there is no room below where we are is wrong.