To me:
"Core" pieces, or players that the team will build around:
Nash, Stepan, McDonagh, Staal, Callahan, Lundqvist, Brassard (perhaps premature, but his performance down the stretch and in the playoffs was really incredible; either way, I think the team plans to build around him, and that's what I'm listing him here)
Complimentary players to supplement the core:
One of Girardi or Del Zotto, Kreider, Miller, Hagelin, Stralman, Moore, Zuccarello (a couple of these players could transition to "core" based on their performance over the next few years)
Role players:
Boyle and Dorsett
The rest of the players on the team aren't worthy of mention, although I like how Pyatt played in the playoffs.
***
Would like to see a piece added to current core, at wing; perhaps Kreider can become that player. Hopefully, DZ or Girardi can be moved for a player who could cross over into that category (preferably DZ).