I think I can help answer those.
Spoiler Show- Roxas has a role to play
- no idea how deep about Larxene and Marluxia they go but they do mention it
- no idea about much UX stuff yet, but there is some stuff in
- you do see his face, and Vanitas does seem to pop up quite often.
- no word on Demyx as far as I know
I think that's as loose as I can be without spoiling too much xD
Ahhh that's all good!! That's as much as I'd like anyway. Thank you so much for this <3
Okay guys I'm out, I'm happy to see that the general opinion is positive. I look forward to reading all this after I bested the game lol.