Our offense last year - while not great - was 10th in the league in points per game. We scored 24 or more points in a game 11 times. We only won 5 of those. It was clearly the defense that was the problem, and I don't think it was the talent given what they were capable of prior to Mr. "don't-let-him-leave-the-building-rex-the-fraud-ryan".
Yes, the schedule on paper is more difficult, but I do expect a better performance from the D despite new schemes and coaches.