I, like many others, can't enjoy Ishimoto's work on this game. The entire Scala-Final Xehanort section fills me with unimaginable fatigue as the same motifs are hammered into the ground with unrealistic AND unappealing synthetic orchestral sounds. I'm all for crunchy, gamey sounding MIDI music, I really enjoy older samples, but Ishimoto's works sound more like they're striving for realism and falling extremely short, which is odd because there are tons of high quality orchestral sound banks that almost sound real.
Like never before, Yoko Shimomura has really had to share Kingdom Hearts III with other composers, and, to be an annoying purist, that can be felt a lot when playing. Cutscene tracks are amazing, but the long stretches of time without a Shimomura original is kind of disheartening considering how fast and frequently KH1 and KH2 threw new iconic tracks at you.