The biggest thing about the Kelly signing is the opposition OL now has a "pick your poison" type situation, who do you double team on any given play? If it's Wilfork would you trust the G & T to be able to contain Kelly & Jones?
If everyone plays to potential, teams might have to start leaving the TE in to block, weakening their receiving options - that would be optimal for the Pats because they tend to struggle covering the TE.
A beast front 4 can hide a lot of problems elsewhere on the defense, so let's hope the Pats front 4 come out firing.