I never understood the whole "rebuilding" narrative. Besides Floyd and Morse, the Bills lost a bunch of guys who were no longer contributing at a high level (if at all).
We didn't lose the Poyer, Hyde, White, Diggs from 3 seasons ago. Don't even get me started on Gabe.
The on-field production lost, was absolutely replaceable with player development, a decent free agency, and a good draft. The Bills happen to have an elite GM who had a plan.