The Bears added the NFL's leading TD guy from last season, the 2nd RB in the Draft, 2 new OLineman, and they get their #1 QB back.
I think that will help their offense 10 fold.
2 OL, a top WR, a stud RB, a #1 QB
Plus the Bears had a great defense without their 3 best players for the majority of the season. Brown, Urlacher, Tillman