The only reason Nomura said that a Final Mix isn't in planning at the moment is because the English version wasn't released yet with the English voices.
That problem no longer applies.
I think that with such problematic scenes like Xion seeing Riku's half argument with Zexion without anyone bothering to clue us in about how she has [B]Riku's[/B] Memories to her or how we got to see nothing of the Riku-Xion interaction despite him being about the biggest influencing power on her in the game that they already have plenty of content to add without even glancing at the other Organization members, the whole Axel-Saix plot, etc.
Very true. I was left confused about the whole Riku Xion thing as well. I actually kind of hope they do it now...