I asked this before the start of the season, and I'll ask it again, if the DT's can't get it done up front this year, then should the Bills look at replacing them? Based on yesterday's performance, Kyle Williams had a sack and made a few tackles, Dareus knocked down a pass (which could have been an INT) as well as a few tackles (but was tossed on his butt by the Pats O-line). http://forums.twobillsdrive.com/topic/161144-should-the-bills-get-new-dts-in-the-offseason/
Considering the Pats had their most success running the ball up the middle of the field, that falls on the DT's.
Where I think the Bills run game improved from last year was on the edges, but where it is still horrible is up the middle.