When I first predicted that they would not be favored in a majority of the remaining games, their schedule looked brutal and they had already lost to the Bears, Broncos and Falcons with upcoming games against the Rams (before their entire team got injured), Dolphins, Chargers, Chiefs, and Buccaneers (before they fell off a cliff). They currently have a SOS ranked 24th through week 15 and play 3 below average teams to close out the regular season. Their schedule which at one point looked tough turned out to be pretty friendly.
As for fearing the 49ers, I don’t agree. If the Chiefs can double them up, I think the Bills can as well. Deebo is currently injured and who knows if he will be back to 100%. Our defense is better than all they faced except maybe the Broncos and statistically the Commanders. The 49ers run D is the gold standard no doubt but their pass D is not as effective as they currently rank 13th in yards per game through the air. This aligns unfavorably against Bills pass first game plan.
Bengals, Eagles, Cheifs are the only teams that I would be concerned about. And in that order.