- In 2010 reports were that he picked Cunningham or Dunlap in large part because he thought Cunningham was a better fit at 3-4 OLB. He then switched to a 4-3 base and Cunningham didn't fit well at all, and didn't last out his rookie contract, while Dunlap flourished in a 4-3 base with Cincinnati. Meanwhile in 2012 Belichick drafted Chandler Jones, who fit much more as a 4-3 base DE than as a 3-4 OLB.
- In 2010 Belichick drafted a thumper LB in Brandon Spikes who was a natural fit in a 3-4 base. Then in 2012 he looked at every smaller, faster LB (Lavonte David, Bobby Wagner, Mychael Kendricks, Zach Brown, Demario Davis) and was widely rumored to have interest, only to take another 3-4 thumper in Dont'a Hightower who was largely redundant with Spikes. Then in 2013 he drafted a much more fluid LB in Jamie Collins.
We obviously don't have access to BB's thought processes, and he's not exactly likely to explain himself, but it seems like he has been rather inconsistent in the type of player he has been targeting, or the kind of defense that he wants to run.
He has spoken openly about the evolution of the game and moving to different types of players than he would have previously targeted (I believe those comments were made after drafting Chandler Jones), so great mind or not, he seems to be moving in a somewhat new direction at times, while at other times he seems mired in old habits.
I think that if BB were truly clear about trying to run a hybrid scheme with a predominantly 4 man front he would have been more aggressive about some of the players he passed up. But that's only my surmise. Short of BB explaining himself, we won't have clear "evidence".