I just watched Poeltl's Draft Express video and was pretty impressed. He's more mobile than you might think and has a nice touch finishing at the rim. His mobility makes him a good pick and roll defender, looks comfortable defending at the perimeter, which I think is a must in today's NBA. Good size at 7'0, but only average wingspan for that size.
Has improved his free throw shooting from 43% last year to 68% this year, so maybe there's potential for him as mid range shooter.
I think he'd be a good pick at 5-6, but we're getting a 1 or 2, so it probably doesn't matter.
