Let's look at what is likely to happen in the near future:
1. The lockout is going to continue. All off-season training activities, from fitness work through to play installation, are going to be heavily reduced. Because of this, there will be an extraordinary focus on guys who can play from day 1, without a substantial amount of preparation.
2. What positions require the most preparation and study?
In my view: Quarterback: Obviously
ILB: The QB of the defence
C: The QB of the line.
Then you have (in the Belichickian defense)
OLB: Due to the multiplicity of run/pass keys
G: Due to the complexity of protection schemes on the inside.
SS/FS: Similar to ILB, but a little less required.
The positions that require the least prep, in my view, are
OT (you're on an island - you don't often pass off guys, pull, or even get to the second level. you get your guy and stop/move him)
CB (with the slot being more complex)
So, BB stocked up on guys who don't need a huge amount of prep. 2 RBs who may suck at pass protection early, but will be able to pound the rock. An OT who may be raw, but doesn't need to learn a lot of protection schemes. A G who is expected to PUP anyway. A CB who will mainly play outside rather than inside, reducing the learning curve. Let's say we'd selected Cameron Jordan and Brooks Reed. Would they be anywhere close to ready on Day 1? Maybe, just maybe, they'd be useful on 3rd-and-long in a sub-rushing situation. But that's it.