It feels like forever since the Saints have been relevant

The original didn’t need fixing. I think many coaches could’ve done as well with Brees at the helm, and quite a few would’ve likely done better.
I'm not saying Brees couldn't, although CSP is the one that unlocked the potential. When Drew retired and we were left with what we had due to people moving on and losing players due to cap hit, hindsight tells us that we are a 10+ win team if neither Jameis or Taysom gets hurt and easily make the playoffs. The next year with a better overall team, we only win 7 games. This season with a better overall team and weaker schedule, we win the same about that we did Payton's last year here. Tell-tale sign of a coaching issue.