They're saving the rest of the patch notes for maintenance day, so people who are eager to play can keep themselves busy reading the notes and make a better roadmap/to-do list.

They might also want to prevent people from theorycrafting just yet, you have to remember, the patch notes pretty much gives everything, like which quest unlock which. So I guess they want to keep it hush-hush for as long as possible. I'm excited about the lodestone update that comes with it, can't wait to see the stats on tome and coil gear <3