In short, I just don't think he's a very good hockey player.
He's essentially a third/fourth-line player and I'd rather his roster spot be reserved (poor choice of word perhaps given Nolan/Murray's stance for not handing spots out) for Larsson/Deslauriers or a veteran free agent in the Winnik mold.
Ideally, Buffalo enters the 14-15 season minus Scott, Konopka, Ellis, Leino and Conacher and adds Kaleta, Reinhart, a Winnik-type of FA and, of course, Callahan (unlikely) to its F ranks next year.
Foligno-Ennis-Stafford
Hodgson-Girgensons-Stewart
Winnik-Reinhart Callahan
Larsson/Deslauriers-Mitchell Kaleta
I suppose Ellis and Konopka can be re-signed, forcing Larsson to Roch for the season.
And Reinhart may not even be an NHLer next year (let alone a Sabre). In which case, fine, I guess you can bring Conacher back (same can be said re: Callahan, obviosuly). I'd prefer defensively responsible bottom-six players to Conacher, though.