We ended last season with Siliga, Chris Jones and Vellano at DT. I'll take any upgrade over that, including 2nd year improvements by those guys, and improvements due to better positional depth.
At NT, Wilfork reportedly looked good in minicamp and OTAs and has declared himself ready to go, but has yet to be tested. It's still unknown whether his reported explosiveness will translate when he goes up against competition, or how his Achilles tendon will hold up.
At the 3-tech position, Easley is competing with Tommy Kelly, Armond Armstead, Chris Jones and Joe Vellano. The bar set by Jones and Vellano last year is not that high. Armstead has yet to get on the field, or to be medically cleared for contact, so Easley is well ahead of him. Kelly has been a bit slow to recover from his ACL injury and is 33. I think it's an open question who wins the starting job at that position going into training camp, but a healthy Easley has as good a chance as anyone, and I think that he'll at least get a significant role out of the gate if his body is ready.