Almost forgot nickel corner Captain Munnerlynn's exodus to Carolina.
Every year, the percentage of plays where a defense is in nickel goes up. This correlates directly to offenses going to spread formations to try and limit the time their offensive linemen have to pass block. As I spoke of earlier to myself while in the bathroom, the lack of quality collegiate offensive linemen who can pass protect in a pro-style offense gets worse every year, due to college teams running the spread O.
So, to counter the spread offense migrating into the pro game, defenses need 3 capable cornerbacks. Playing nickel back is a different beast, as they line up towards the middle of the field and do not have the luxury of using the out-of-bounds as leverage in coverage. He's gotta be quick as a cat and savvy like an old sailor.
Big shoes to fill there.