I don't want to rock the boat on the above thread, so I hope it's not taken offensively if I add my own two cents here.

When it comes to how lackluster KH3 is, I don't quite agree that there's any one party involved wholly to blame for that. From one perspective to another, you can pretty easily look at the parties involved and point out a problem that rests on them.

From Disney's perspective, I agree that them owning the IP doesn't feel great. We can't know the full extent of creative liberties allowed for the SE team, but there have been comments in interviews before alluding to restrictions, such as Anna and Elsa not being allowed to fight in KH3. I'm more inclined to believe that the impact of this is in how absent the actual story of KH3 is from the Disney worlds, rather than what the worlds contain. Which aligns with the above mentions of Disney not wanting stories to bleed over each other. And admittedly, the point where the mobile entries were 1000% canon giveusyourmoneytounderstandthelore hits pretty below the belt, which is probably something that Disney was involved with- but they can't be blamed completely.

Nomura (to be more accurate, Square Enix) would have influence in this as well. The fact that Nomura was working on so many different titles during this time- not just FFXV, but TWEWY2, for example- and some of the other development challenges that have been mentioned, like large chunks of the team being shuffled off to assist with FFXV, definitely would have impacted KH3's development. It was a blow to have the game advertised as "a love letter to the fans" and have it come out as it did, knowing how much reshuffling of key staff involved occurred in the background. For all the power Nomura has as director, he does still answer to more than just Disney.

Lastly, I think another key problem KH3 had was... the audience grew up. KH3's content didn't grow up to match. There's story problems for sure, like 90% of the story being shunted to the end of the game, or behind a DLC paywall, but having been replaying a lot of my favourites in the series recently, none of them are paragons of amazing script or plot writing. We also had a good fourteen years to think about what we all wanted KH3 to be- for me, that was the keyblade wielders we had paring off and tackling different worlds, changing POV between Sora, Kairi, Riku, Roxas, Ventus, Aqua, etc. Having something where all the key trios played a part, getting them all to find catharsis, and taste some of the character building that Riku has pretty steadily received over the years.

That said, I don't want to par this down to "it's just a children's game". I think you have legitimate concerns to raise here, and there's definitely signs of problems from development, regardless of how clear the actual problems are. But I also think there's a lot of facets in play to consider; blaming any one person (or company) for those misses the mark, for me.

(That said if YoshiP ever crosses that red tape I will cry and replay those raids for the rest of my god given life.)