The only zone to me that dragged on was actually Radz-at-Han (part 1). The rest of the zones of Endwalker were better designed narratively, functionally and artistically than any expansion before it. They have mastered their engine and it shows. That's not to say Endwalker was perfect, though. They overused their new quest mechanics and it wasn't quite as bleak as I wanted it to be. It was bleak enough, but in true Final Fantasy fashion they just had to introduce comic relief characters to tone it down. I embraced it but if I were in charge I definitely would have leaned in way more heavily on loss and destruction.
Also, the ending was...well, I think I need to digest it for a few days. It was quite good, but I have some issues for sure. Regardless what a fucking ride that was. I was pretty engaged from start to finish. I was also lucky to not have run into much trouble logging in and I didn't experience any server lag or disconnects.