For a team like the Bills, who have been mediocre for so long and unfortunate enough to play in the same division as the greatest dynasty the league has ever seen, we need to be better than other teams by a large margin. This is to both overcome our own built in culture of failure and the fact that we get absolutely no breaks from the league or it's officials in games.
Until Brady retires and Bellichick leaves with him we need to essentially be a 12 win team in any other division to make the playoffs, maybe better than that. This is why our recent trades don't bother me yet, we aren't a 12 win team yet but those trades may help us.