I'm glad episode 3 of On Parade answered most of my concerns. Very little time passing in Friends universe while they're gone, and also you have characters from other universes travelling to the Friends universe i.e. it's not just Raki who can open the gate. However, I suspect that whenever Raki summons a gate, one appears in all universes?

I still don't like there being three performances per episode, especially since 2 of them are just archive 🤔