Ok, just read through all 150 posts of this thread. Without getting into the specific arguments that have comprised most of them, here are my thoughts:
1) Comparing the NE linebackers to the Pitt linebackers is not a one-to-one argument. You can't look at numbers or how they look without taking into account that the two systems are different. When you have a system that emphasizes the linebackers being the big play makers, they're obviously going to look a lot better, and more draft resources are going to be spent trying to get them. Doesn't make them better, but they sure do look a whole lot beter.
2) I don't see how anyone can argue against Deus' point on injuries. If it weren't for Colvin/Thomas injuries, Bruschi's stroke (honestly, how many times has that happened to an NFL player in his early 30's in the last twenty years?), and Johnson's sudden retirement, we've been put in a position where we had to play catchup. At that point it's not about building a dominant LB corp anymore, it's about damage control.
3) Football is NOT baseball. When you have a baseball team with no power, you add a 40 homerun guy and he gives you 40 more homeruns. You need better starting pitching? Get a great starter, and he'll add the value that he adds. You don't need to rely as much on how they will fit with the system, or how they will effect the play of other teammates.
In football, eleven guys work together on defense to achieve something. Pass rush means very little if the receivers are always open, and conversely, great corners mean nothing if they have to cover for too long on every play. Every position effects every other position on the field.
You want to improve the pass rush this year? Sure, a beast pass rushing linebacker would help, but you can always improve the secondary which gives you more time and more blitzing options. Or change the scheme slightly, which is something BB is not afraid to do. Or maybe use different line personnel on third down, all things that don't change who's playing linebacker, but might have an impact on situational pass rush.
The game is not as simple as, "Pass rush needs help, insert player X, done."