>>1129233
From what I understand (do not take me as empirical), he was REALLY invested in its development as part of the "Fabula Nova Crystallis", a series of games that would be centered around some shared concepts (including things like Type-0 and the FF13 trilogy itself). Things didn't quite pan out as a result of 13's mixed reception and Nomura got ripped off his passion project while they put in some stooge named Tabata to shoo it out the door to recoup losses after being divorced from 13 as FF15. That game had a LOT of its story trimmed and revamped for the worse (particularly regarding the female lead Lunafreya, formerly Stella), and it STILL got panned.
I'm guessing Nomura died a little inside from watching his baby get mutilated, and he's trying to use KH to get an approximation of his vision - hence that scene with not-Noctis (Yozora) and Luxord in the limo directly paralleling one of Versus' old trailers.
>>1129254
>Seemed weirdly disconnected between worlds imo
Disney's fault. They were infamously strict about certain properties behind the scenes - particularly Frozen, demanding the entire Let it Go sequence be adapted but simultaneously that the KH characters could not influence the plot.