The passing engine has changed some this year, DBs now will begin to react as the QB gets in throwing motion not just after a button is pushed. They brought in two Steeler DBs to teach them how DBs respond to QBs on pass plays. Rex Dickson goes into detail on the passing game improvements in the podcast. Also WRs and DBs now will react and stretch out or leap for overthrown balls, no more standing still as the ball goes over their heads, assuming the ball is in a realistic distance from the WR or DB.