Endwalker was a great mess(SPOILERS)

[Floortank]

Meteion is a surprise because she was introduced in the second to last zone. Over the course of a 10 year build up. Yu Yevon was brought up over the course of 10, but seemingly appeared out of nowhere. Jecht, by many, is considered the true final boss. As with Necron, it just shows up.

The 10 or 15 hour span between our last moment with Meteion before the Endsinger is more time to sit with it and feel the product of her actions than we get from the time we actually meet Yunalesca and see what happened to Jecht and Auron firsthand, to the end of FFX. Perhaps maybe an hour or two hours of the game remains at that point. We knew details about Jecht and Braska's story, but not the full scope until those scenes. And it does not reduce the ending even one iota.

The problem with Meteion is Meteion. They rip whatever dramatic tension she represents right out of her by making her a victim and essentially good, but misunderstood.

EDIT: made some FFX references more ambiguous due to spoilers

EDIT: Also if you were surprised by Meteion to the degree that you think the Endsinger is like Metron, I dunno what to tell you. I knew I was looking at the final villain the moment I met her. There's no way the cause of the Final Days would be something so obvious Emet-Selch would miss it. She was an immediate red herring.

I read a shit ton of books.