Don't know where you got your numbers buddy, but those are wrong.
Woodley was measured in at 6'1.4", 266 lbs, with a 4.74 40 yard dash.
Graham measured 6'1.3", 268 lbs, with a 4.71 40 yard dash.
That would make your analysis completely false. Graham is nearly exactly the same height, and is faster. As for agility, that would come down to watching tape, and I didn't watch tape on Woodley back in the day.
And Belichick clearly is drifting away from the "prototype." Adalius Thomas, Derrick Burgess, Banta-Cain, and Ninkovich, the Pats 4 top OLB's last year, were all 6'2" or shorter.
I got my numbers from CBS Sportsline/NFL Draft Scout, a pretty reliable source. The discrepancy in our numbers is likely a result of Pro Day, personal workout, and combine numbers.
Whether Graham is similar in measurables to Woodley is irrelevant as far as the Patriots are concerned. Woodley plays in the **** LeBeau zone-blitz 3-4 and is thus relied much less on to set the edge in the run game. Sure Woodley would probably succeed here situationally, but it is unlikely BB would take a chance on someone he projected as situational high in the first 2 or 3 rounds unless he felt he was truly special. I was simply using the difference in their measurables to further add to my point that from what I have observed on the field, even the pointless (from a Pats perspective) comparison of Graham to Woodley is off-base.
As far as the veteran acquisitions you listed, I'll address each individually and explain why they don't indicate BB doesn't adhere to his 6'4 4.6 prototype as you claim.
Adalius Thomas: His 2000 combine numbers indicate he was 6'3 270 lbs and ran a 4.56. Has very long arms and had proven he could play in the NFL with the Ravens before BB acquired him. Also was valued in part because of his ILB/OLB versatility.
NFL Draft Combine History - CBSSports.com - NFLDraftScout.com
Tully-Banta Cain: Doesn't fit the prototype, your right. But was drafted in 7th round and has been best used situationally as a pass rusher. When he has been asked to be a base 3-4 OLB on run downs, he struggles setting the edge. See the 2006 AFC divisional game v. San Diego (in which he was benched the following week v. Indy) and his unremarkable stint with San Francisco.
Derrick Burgess: Acquired in the preseason because BB was desperate for a pass rush in any way shape or form. Like TBC, was used as little as possible on run downs in the base 3-4. Notice how Woods and AD got most of the time on 1st and 2nd down in 2009.
Rob Ninkovich: According to NFL Draft Scout, he measured in at 6'3 260 lbs. at the combine and ran a 4.71 at his Pro Day in 2006. Again, close to the prototype and was a waiver wire acquisition.
Rob Ninkovich, Purdue, NFL Draft - CBSSports.com - NFLDraftScout.com
My point is that even when BB has varied slightly from the prototype, it has been for a situational guy and has not been with a high draft pick. Given his hsitory and my best translations of Belichick-Neese, I highly doubt BB will spend a high pick on someone he deems to be only a situational player. What the Patriots need is an OLB who can rush the passer and has the size, length and strength to stay on the field all 3 downs. BB has deemed this type of player to be someone who is 6'4 and can run in the 4.6s. Given this, it is highly unlikely BB spends the top 60 pick required to select player such as Graham or Hughes.
