Looking at the Tavon Wilson pick in a vacuum is silly. You have to take into consideration what the Pats had already added in Jones and Hightower. Jones is an OLB in the Pats 3-4 and Hightower is an ILB in the 3-4 and MAYBE a pass rusher in the sub Packages.. But he's also 6'2 1/4.
Lavonte David is 6'0 1/2. He's only 233 lbs. David's ONLY position for the Pats would have been ILB in sub-packages. Yes, David has a very good vertical and strong legs and is an excellent tackler, but using a 2nd round pick on a guy who really doesn't fit the Pats 4-3 system doesn't make any sense.
As I mentioned in another thread, David is perfect for the Tampa-2. And that's exactly where he went. He should be excellent there, provided the rest of the team doesn't suck..
But, once the Pats added Hightower, there was no way David was going to be drafted. And, in all reality, I doubt that David had a high ranking for the Pats because of his height and weight and his system limitation.