One possibility I think is worth mentioning is perhaps using Wilfork more on passing downs. When Wilfork was drafted, he really wasn't a true NT, if I recall. He was tall, but under 300 pounds and was used as a pass rushing interior lineman.
Now Brace comes into the NFL at 6'3" 330, and if he can play well enough to take about a third of the 1st-2nd down snaps at NT, then that keeps Wilfork rested to disrupt the middle on 3rd and long, which could be untapped potential for him.
Just a thought. As for the rest of the DT, we're talking late round fliers really. 6th and 7th rounders you figure come into camp to give existing backups/ps squad players competition and you see who sticks.