It goes without saying that QB is THE key. If you look at the roster returning, it looks better than OK. O-line returns 3 starters and at least 3 other guys who've had experience in Polk, Galati and Larkin. Both TEs are back. Receiving corps looks fine with Salomon, McCants, Bronson, Antoine, Barr, etc. Cronkrite was a nice add for experience at RB while Sands, Mack, etc. shakes out for depth.
D-line looks promising with the nice freshmen tackles, two Duke transfers, Reaves, Bronson, Livingstone with experience. Swatelle and Johnston at LB need more help. Corners are solid with Hoggins, Wilkins, Hampton. Thomas gives some experience at safety. Time for Watts to live up to his billing.
That's a pretty good group already before anyone else steps up - and you know they will. If the QB is manageable, you can definitely win with that bunch.