I think it's too early to put a floor or a ceiling on Hagens as he just turned 16 and has a year and three quarters of prime development time ahead of him with the NTDP.
I will say this, they're both pretty damn high. Claude Ruel's famous maxim about identifying great players -- "They're the ones with the puck all the time" applies to Hagens, who seems like a puck magnet to me. Great hockey sense and anticipation is what drives his game, but add to that a nice dose of moxie and you're looking at a pretty safe bet.
He also has a plus shot that will improve as he gets stronger and fantastic vision, stickhandling and passing ability, which bode well for future production. If there is one area that I don't have a great read on, it's his skating. While he has a good stride and great edges, I wonder if he's got an extra gear or two as he gets stronger. (I've only seen video of him and haven't had a chance to see him live yet, so perhaps someone who has can give us their thoughts on this.)
Lastly, there is the issue of size, and while I'm not concerned about it when a young player is this skilled, if he grows like his brother Michael who will be 18 in February and is
listed at 5-11, 170* on USHL website, that should raise the floor a bit, or at least solidify it.
* both measurements "confirmed by NHL Central Scouting."