http://www.youtube.com/watch?v=g4vDZ_OquS8
http://www.youtube.com/watch?v=En6cTw1nGSo
http://www.youtube.com/watch?v=DVnAFdRY_I4
Look no further than Sports Science to know that this idea is over reaching to say the least. Time is of the essence for the QB, to artificially slow down the trowing motion by design doesn't do justice to the elite Qb's in the league and only serves to even the playing field far too much in player VS player games. The best idea in my opinion is simply to tune the reaction time of the defenders (make the ratings matter) and lower the jumping ability of the linebackers while also changing their vision. Players simply can't make the accurate defenses to passes IRL like they can in madden. Sure a defender can make a play on a ball they don't see thrown based off of the receivers reaction, but they can only go for the block, "guess swat", or go for the receiver's hands. These things are currently not present in the game and would actually add to the realism if they were.