I really hope teams look down on size again and pass on caufield.
I don't see him falling past 20, and even if he did it would cost the Devils significantly to move up and get him. If Colorado drafts Hughes, I can honestly see them drafting Caufield with their second first-round pick -- the two players already show significant chemistry.
In my mind (and apparently yours), Caufield is the best right-shooting winger in the class of 2019. His shot is as good as anyone in the draft class, and he's extremely smart and skilled with the puck. If he were a bit faster (he has good but not great skates, and scouts like smaller players to be speed demons), he would be a top 10 pick. Despite Caufield's 5'7-150 frame, he's not a soft player by any means and will go to the net like a Brian Gionta or Brendan Gallagher. He certainly has 30+ goal upside as an NHL-er.
If the Devils are going to draft an undersized, sniper RW in the 2019 draft, it is more likely to be Bobby Brink. If you're not familiar, I suggest you look him up. He's Caufield's size, maybe a bit stockier, and has a similar laser-beam shot. He's also great with the puck and not soft, and very comparable to Caulfield except Brink has average skates at best, which will drop him into the second round, where the Devils have three picks. I would say that Caufield has first line upside and Brink second-line, but Brink can also be a 30-goal guy if everything gels in his development.