In all honesty, how many teams have been this patient with a 1st rounder?
D+5/6!
Probably more than most realize. I think it just seems like such a long time because the sabres kept him up at 18.
In reality, a ton of first round picks don't truly arrive until they D+5 or +6 season.
I think if you look closely at every draft you may be surprised to find a couple, and with Mitts' under-developed physicality, it probably should have been expected.
Guys like Hertl, Koivu(Mikko), and even the Sedins come to mind, just off of the top of my head. We could probably even throw Hischier in there to some extent. He was a full on passenger with Hall his rookie year and didn't produce anywhere near that level again until his D+5 year