I think Sheed has definitely regressed over the last two seasons. Still - a lot will depend on whether he develops any chemistry with the team or not. He could be a boost to them, and he could be a hindrance to them. Overall, Doc is really going to have to show some coaching skills in terms of putting together a rotation that gets through the regular season in one piece. I see a lot of guys there that will be effected by tough stretches in the schedule, or injuries that bring more playing time.
Boston still has a definite edge - but it's not hard to see how they could slide a little.