The past 12 months, I think both the Bills and Sabres listened too much to the outside noise and it led to less than optimal results.
For the Bills, it was all the stuff around how Josh Allen needs to run less so that he doesn't have his career shortened like Cam Newton.
For the Sabres, it was that they needed to get better defensively to compete in the playoffs.
Sometimes, that is like telling Mariano Rivera that he needs to develop a new pitch because he throws the cutter too much.
Buffalo being better defensively is about adding just a smidge of basic hockey to what they do.