http://espn.go.com/nfl/story/_/id/96...oncussion-suit
Yeah, we all know the answer - sorry, nope. Player safety.
As some people pointed out in the comments, $765M, minus the one-third that the lawyers probably take, split 4,500 ways, comes out to about $90-100K per player, and that's not counting whatever portion goes to research and medical exams. So the net take-home after taxes is maybe half of a decent year's pay. At a regular job, not an NFL job. Food for thought.
Technically, you know, they should be free to get rid of all the crap rules they want, since the lawsuit was based on the league "covering up" the risk of brain injuries, and there's no way in hell to argue that every player now isn't well aware.