I’ve run a couple of one-shots. If you’re already getting good success with it, then you’ve probably already figured out most of the tips and tricks I would offer, like “Make sure the players understand how broad Skills are, and that they are superhuman ninjas who can do absurd things.”
I’ve not attempted any campaign play, but I think the number one tip is that players have to NOT hold on too tightly to their PC concepts, or it becomes impossible to write new Secrets. They need to accept that they’re going to have weird unforeseen past connections and dark secrets and things.
Edit: Other suggestions – Don’t have everyone play their “original” PCs every time – maybe about half the group should play new characters each time. Try to keep the initial ‘scale’ of revelations about the PCs smaller (this doesn’t work so great if you’ve already done a one shot) so you can reveal more about them over time. Try to have an MCU-style “arc plot” to tie otherwise disparate sessions together?