Rewatching The Little Mermaid after doing that section in KH2 made me go from "this is a bit stilted and awkward but whatever" to "you took this film and you butchered it, BUTCHERED it!"
This shit is like Theatrhythm, build an FF game around the music the one thing everyone likes in every FF game. Musical drama is exactly the kind of shit that fits perfectly in an FF plot and I have been craving it since the first news of it almost happening with XV dropped.