The Patriots had a record setting offense last season, and peaked in a 52-7 win over the Redskins. Now Tom Brady is gone and they scored only ten points in a game last week against the San Diego Chargers. They were losing 30-3 in the closing minutes.
So what has changed? They have all the receivers back. Their QB Tom Brady is gone with a torn ACL. And their offensive line (I think) has had injury troubles.
This team is a perfect example of the "skill" players outside of quarterback not really effecting the outcome of the game. Its the offensive line that matters first. They struggled in the Super Bowl because of their offensive line, and are now basically a second or third rate team because their offense has been decimated.