The way I understand it, AWR keeps players in correct positioning to make plays. It keeps a RB from drifting away from the line while pass blocking, allows CPU QB's to make smarter decisions, makes WR's run the correct route (not sure about in madden, but occasionally in previous NCAA games, low AWR WR's would run wrong routes). It keeps a defensive player in his assignment as well. Play a low AWR CB at FS and watch what happens. Occasionally, they will make mental mistakes and get beat deep. Low AWR OL will false start more often, low AWR DL will jump more often hopefully in Madden 15. Remember the passing cone in the past from like 2006 or something? That was all AWR. In NCAA, low AWR QB's on the road would be inconsistent, and pre-play, the controller would shake and you couldn't see play art.