Look, here's the problem I have with this "mini-rebuild" argument...heavy roster turnover is a constant in the NFL, even among top teams (the Chiefs have only three starters left from their 2020 Super Bowl team), and the Bills still have a lot of continuity and veteran talent in place, especially at QB, CB and the offensive and defensive line, where continuity matters a lot.
It seems to me that the "mini-rebuild" argument is just a way to give Beane and McDermott a free pass for whatever happens this season, when they've been in charge of this operation for eight seasons now and have yet to show acceptable results. Teams with true franchise quarterbacks should never really have a down year unless the quarterback gets hurt. To the extent the Bills problems this year are a result of the dead cap they are carrying (which I don't believe), who do you think is responsible for all that dead cap space?