Some people have an idee fixe that they can never let go.
Fact: We have four positions to fill at LB.
Fact: we have four veteran incumbants, All with starting experience. Those four produced a Top Ten rated Defense, even though they were wracked with injuries, in 2008.
You seem to believe that there is a glaring hole there; but most would disagree. It is not even as if there was no depth. Inside we have two established veteran, ex-starters, Bruschi and Lenon, available as reserves.
Outside we have two veteran starters, Thomas and Woods. It is not as if there was no depth. Outside we have a proven veteran pass rusher in TBC, and a high draft pick, a prized rookie from 2008, who has had a year to orient, and spend in the weight rooom, as all said, was needed. A third reserve has spectacular size and speed.
Two of the four are Probowl quality; and a third is an aging ex-probowler. A LB squad, hardly bereft of talent.
Overall, this Defense is faster and younger than any of the Belichick era. It has the potential to be the deepest and BEST too.
I find myself having to constantly defend Woods as if he were a star; he may develop into one. But at minimum, he is a creditable, good-sized, speedy, quick, young, veteran, SOLB starter. If he is the weakest of the starting 11; which I don't concede; he is hardly a glaring weakness either, but a better than average starter.