The noteable change is in the Defensive Secondary. It appears that Michael O'Connell has beat out James Smith for the starting Free Safety job, and Allen Bell is now listed is #2 at Strong Safety instead of Free Safety. Also, Darius Reynolds finally makes an appearance on the depth chart as a returner.
Not exactly sure what the story is with Smith, but having O'Connell start can only be a good thing. Either he has beat out an established starter and the Cyclones will get better production at that spot, or both of these guys are equal and will give each other some good competition for playing time (in which case we will likely get better production at that spot as well).