I don't think anyone really can say "let it go" until the NFL (Goodell) comes out and faces the music first. A giant majority of Saints fans do not expect the game to be replayed (there is a vocal minority), but we know that isn't going to happen. It would be cathartic if we just heard, "Sorry. That call should have been made. You have every right to be upset. We will strive to make sure that what happened to you does not happen to another team." If Goodell came out and said that, you would see most of the Saints fans drop it. Some would still scream, but most would move on at that point. It is Goodell hiding like a coward and pretending that this didn't happen that is keeping the fire stoked.
So don't tell us to "move on" or "let it go" until the wrong is acknowledged by Goodell. Be a man for God's sake.