It doesn't erase it, but it lessens it. A four man front makes it harder for the other team to double team both defensive tackles. A four man front would allow us to have one big defensive tackle basically clogging up the middle and would allow Nikita even more freedom to move around the field. It would also allow us to shift into 3 man fronts, with Nikita moving lining up outside, etc. Of course, you've got to get a decent big defensive tackle and 1) that's been a difficult position for us to recruit and 2) when we get one we seem inclined to move them to O-line (see Ford and Bolling). I think if Booi had worked out up to this point of his career we might still be a 4-3 team. Overall, I've been pleased with the defense this year, especially when compared to last year, but I think to be a contender in the Atlantic division next season we're going to have to figure out some way to rush the passer better and be better at not giving up long runs.