So, here's my model: i'd like to build Chicago just with some modifications. I think Chicago's skating ability from the top to the bottom of their roster is a huge advantage over everyone they play. While I fully understand they don't play quite as physical as Los Angeles or Boston, they do have plenty of physical players and most of the players on the roster can play through a physical style of opponent.
The modification that I would make is the scoring ability that Chicago gets from Patrick Kane would be better served if he played center. I think Chicago would be more effective if they had Toews at center and Kane's scoring coming from a center position. Saad, Bickell, Sharp, and Hossa fill out a tremendous top six.
Buffalo can get this type of top six by drafting Reinhart and McDavid/Eichel. Then they need to surround those two with physical forwards (Larsson, Carrier, maybe Foligno), wingers that can play through a physical game (Fasching, maybe Armia and Stafford, if he stays), and support those top two lines with a shutdown line (Girgensons).
The back end needs to be big and mobile. Buffalo still needs to find a power play quarterback and a primary puck mover. I like the bigger goaltenders that Buffalo is collecting. I think they will serve the team well in being able to play through the physical opponents the Sabres are likely to play against.
I think there is still room for players like Ennis and Hodgson, as well as players like Possler and Hurley.
Possible future:
Carrier - McDavid - Armia
Ennis - Reinhart - Fasching
Larsson - Girgensons - Hodgson
Foligno - Kea - Deslauriers
Schaller - Flynn
Zadarov - Myers
Ristolainen - Pysyk
McCabe - PP QB
Ullmark
Makarov