It's okay if you don't liked it.
But I liked the story of the little Lalafells and the smal extension for 2B and 9S. I liked the fights, the music and the glam.
And this story is not impossible in the FFXIV universe. They came from another dimension/planet? We don't know exactly. But it's possible.

My main question is just, what do you guys think, why they posted this trailer yesterday? P: