I don’t think you have to be physical to be difficult to play against. You just have to be able to still be effective when the games get physical. Bratt and Hischier can do that. Hughes struggles unless his teammates can open up space for him.
My thought process is moreso that if you get two more Haula types, let’s say for the sake of this discussion, you add Henrique and Noesen before next year:
Palat - Hischier - Bratt
Haula - Hughes - Meier
Noesen - Henrique - Mercer
Foote - Lazar - Bastian
Holtz - MacDermid
At any given point, you can play Hughes with two of Palat, Haula, Meier, Noesen, or Henrique. Guys that can hold their own and create space for him.
Hughes is skilled enough to create offense regardless of who he is with. Devils need to rely on that a bit until he doesnt get pushed around as much. If he’s playing with two third liners in away games where you can’t control matchups, so be it.