The most disturbing thing is the putrid performance of the defense. Granted, they are missing a couple important pieces, but to face a New England team where the game was there for the taking (Brady looks awful), the rush defense was pathetic-- and never adjusted to what the opponent was doing.
On offense, the only sure starter next year is Allen (have to see if he can up his game, or not--not confident, though). They could clean out the whole OL and receiver corps (except Foster, I suppose), because, really, there's nothing there.