For the folks calling this Rodney Harrison 2.0 I'd suggest you temper your expectations. Adrian Wilson won't come close to that type of productivity. What he can do is be veteran leader in the back-end to mentor the young guns we have back there, namely the other Wilson, Tavon, whom I believe has the ability to be an above average SS and is already better in coverage against RBs out the back field and TEs than Steve Gregory ever will be. He also offers the patented Belichick versatility that he covets. Perhaps this will give them the option of running the BIG Nickel formation.
Hopefully this signing helps stabilize the back end and pushes Gregory to back-up/depth role where he belongs behind McCourty whilst leaving T. Wilson to learn directly behind A. Wilson until he's ready to take the reigns.
This has all the makings of a perfect under the radar signing that will pay dividends in more ways than one.