Rivers would be a major upgrade over Fitz. Look what's holding our offense back, the erratic QB play and a viable no. 2 at WR. We have a good offensive line for once, our running backs are incredible, and the TE position is pretty solid in Chandler. Now look at the Chargers, they basically have nothing on offense except Rivers and because of that Rivers himself has declined because he has to try and do it all himself.
Put PR on this team and that makes the Bills instantly better on the offensive side of the ball. Do that and continue to work on the defense and who knows, this team might actually start winning with consistency.
Of course, all of this means nothing because Sad Diego will not let Rivers go.