If Joker and Comrie come back a week from now we have to make two roster spaces. If they believe a player has trade value, now or in the future, they will not waive them and risk losing them for nothing. KA is very protective in this manner.
That said, the Sabres do not need to waive anyone.
1. Trade any of Hino, Olof, Asplund, Bryson, Fitz, Mitts etc in in some combination that concentrates talent into less roster players or returns picks/prospects.
2. Quinn, Peterka, Krebs, Sammy, Power and UPL can all be sent down without waivers. This is the most likely scenario IMO. They could just rotate these guys, including UPL giving him both NHL and AHL games.
I see no chance of Sammy or Power going down. I could see Quinn going back for a confidence stint with either Krebs or JJP, and then them trying to play Hino and Asplund into a trade. It's a business, and they won't throw away assets if they don't have to.