By Dan Lyons Allen takes over for Sean Payton, who stepped down after 15 seasons. View the original article to see embedded media. The Saints officially have a new coach. New Orleans announced Tuesday that Dennis Allen, its defensive coordinator from 2015–21, will take over for Sean Payton, who left the franchise last month. The opportunity with the Saints will be Allen’s second as a head coach. His first attempt was a rough one. He compiled an 8–28 record leading the Raiders from 2012–14, and he was let go after an 0–4 start to his final season in Oakland. Allen joined Payton’s club the follo…