There is no question that the strength of the Buffalo Bills is their defense. They have ranked in the Top 5 the past two seasons and played a major role in getting them to the playoffs last year.
The offense has lagged behind a bit, especially with Josh Allen under center. The past two years the Bills have finished in the bottom third of the league in yards per game but did show some improvement last season in comparison to the previous year.
This is not necessarily a bad thing and was expected with a young quarterback trying to learn the league.