This right here has been my biggest concern about losing CSP. Dennis Allen's got a hold of the defense, and Carmichael can run/scheme the offense. But I don't think there was a better head coach in the league than Sean Payton for developing a QB.
What QB has Payton developed? Grayson? Griffin? Daniels? He made a smart move signing Brees with a nudge from Parcels but Payton has not developed a QB not even one that studied behind Brees and went on to Garner success on another team.
Payton is a HOF Coach that can win but I would not call him a QB developer as much as he is a master at game planning and scheming an offense to the talent available.