I disagree on White and Uthoff. They do have tweener issues, but I don't think that'll be what keeps them from getting drafted (if they don't get drafted, that is). Gordon Hayward was listed at 6'9" 208 as a sophomore at Butler. White is 220 and Uthoff is 209. Hayward shot under 30% from 3-point range as a sophomore (although he did shoot well as a freshman from behind the arc) and played a similar role to White and Uthoff. He wasn't a post up player; he was a wing player who was a 4 for Butler. And he was a top-10 pick, and is now starting to come into his own during his fourth season.
Hayward was the comparison made with White coming out of high school, and it still fits pretty well. It doesn't fit Uthoff as well, mostly because he's a better ball handler than White is or Hayward was.
What? Hayward was the primary ballhandler during Butler's Final Four run. That's why scouts were so high on him, he was a 6'9 wing who had great handles. Neither Uthoff or White have shown anything close to that.