Dude, don't over-think it or place too much into future drafts. The Sabres have Mittelstadt and Cozens going forward. Add in Beniers, and probably another impact center from the Eichel trade (Turcotte?), and the center rebuild is over and complete.
Between those 3 (4?), the Sabres don't have the McDavid, Matthews, Crosby star power at center. But they'd have a construct a lot like Boston, Carolina, and St. Louis, with a bunch of centers who could be top ten in the league at some point but won't ever be that superstar performer.
I'll easily take ROR, Schenn, Thomas, Barbashev, ....or Aho, Staal, Trocheck.... or Bergeron, Krecji, Kuraly.... or Schiefle, PLD, Lowry.
That's what Turcotte - Mittelstadt - Beniers - Cozens could be.