I think the defense will be improved if for no other reason than the coaches they have will use a scheme that fits the players they have on the roster rather than trying to force players to fit a system, especially a bend-and-break system like Eberflus used.
The offense should be solid and while it may not put up numbers like last year because of the improvement on defense, it should be the strength of the team.
I don't know if this team is capable of reaching the Super Bowl this year because of all the changes and questions that need to be answered, especially at OT and CB, but I feel better about this team and its coaching staff than I did last year at this time.
The commitment they made on defense with the new coaching staff, new defensive scheme and an offseason focus on adding players to help improve the defense provides a glimmer of optimism.