I'd focus on how do we get back to the GM/Coach combo of ML/SP as opposed to the ML/DA duo. I think that would be a MM hire, a strong HC with a winning history and SB Championship.
You want to get back to what the Saints had when they HIRED Sean Payton, not what they had at the end. Hiring Payton was getting a fresh start with a new coach with innovative ideas who could possibly coach your team for the next 18 years. That's not McCarthy. He didn't come here with a Super Bowl win from over a decade ago. McCarthy today is closer to DA than he is to Payton of 2005.