The thing about Coils and Sky Pirates is that they felt deeply tied into the XIV story. They weren't just rip offs of other games locations for the sake of crossovers.
Don't get me wrong, the Crystal Tower raids does this right. Even Alexander tied much better into the world despite not being as relevant as the coils were. All these places forever change XIV and are tieed deeply into the lore.
However.. this trend starting with Ivalice is ruining the immersion for me. As much as I love Nier Automata I want to go to NEW places that expand the story better. At least Eden is heavily tied into the mysteries of the flood of light. Although I Alice has helped expand Garlemald war and the espers a bit, I just hope we get a mysterious new place next time.