Stafford is healthy, won't have any off season rehab (so far as we know), and he has all the skill players he needs to continue to succeed (including the League's best WR).
The issue on O will be the Oline. I'm not predicting problems. Just saying that there will be changes. And sometimes it takes time for those changes to jell and get into synch. We'll have a minimum of 2 new starters although the LT position will probably be manned by Noteboom who knows the system and the guys next to him. RG and C will be interesting to see where it goes.