Saints planned to interview Mike McCarthy; McCarthy didn’t garner enough interest from Saints and will take a year off

he didn't succeed in Dallas because he's a bad coach, he didn't succeed for one reason only, Jerry Jones. No one will succeed there until Jerry dies, and that isn't even debatebale.
He was 49-35 in Dallas and the played in 4 playoff games over 5 years. That is a huge upgrade from DA who was 18-25 with no playoff games.