I think it's difficult to compare Devils to Avs. It's a fair point to raise that Avs showed how helpful speed and finesse can be but without isolating for solely those traits, imo it's very challenging to draw a conclusion that a team can get away with most of their identity coming from that.
Devils have speedy skill but that seems to be at the expense of physicality, size, ruggedness and even durability. Does Hughes hold up through a long, grinding, push and pull playoffs? He gets injured fairly easily.
Devils don't exhibit any rugged mentality in their play either. Their makeup is sort of like a glass cannon.
Avs are very balanced and happen to have a lot of speedy skill on top of that. Their guys aren't as small either as the Devils. Devils aren't balanced like the Avs. They've overdosed on undersized, skill guys that already have health questions.