PoHs + plot introduction and development = Wonderland, Agrabah.
Keyblade information = Traverse Town, Atlantica
SDG development = Deep Jungle, Neverland
Pure plot = Traverse Town, End of the World, Hollow Bastion, Neverland
Heartless + Heart introduction = Halloween Town.
Arguably the only world that's completely redundant is Olympus but you get Disney villains time there and Cloud which makes it important.
Worlds west of Disney castle were a complete waste of time in KH2 and that's even if I give most worlds east of it the benefit of the doubt.
And notice you didn't mention at ALL what most of us talk about. Being characters and such. And liking the FM+ doesn't mean you like KH2. The FM+ was born because Nomura realized how much he messed up on KH2 when he was helping out on the novels.
Final Mix was going to happen anyways, because thats what goes down in Japan all the time with games, and I mentioned FM + to express How much I loved KH2.
And I still find little to nothing significant to the worlds in KH1. Argue about that all ya want.
And Characters? Fine lets talk characters. Sora is still as Naive as before with a sense of Justice. The difference is, Sora knew when to shut his mouth in KH1. Therefore he had the idea of being smart in KH1.
The dialauge isn't that great in KH2, in Twilight Town, Atlantica, and ect.
But KH1 had alot of disney characters that didn't have voice actors that sounded anything like the original, which annoyed me just as much if not more then Lame Dialuge. (Dialuge?)
Whats wrong with the west worlds? You didn't enjoy them? (I understand atlantica)
I enjoy the Keyblades in KH2 but I enjoy the traits given to Keyblades in KH1. Like reach, effectiveness, swing speed, ect.
Malificent was un-needed to the plot, but I found her somewhat enjoyable here and there. Though very rarely did I.
I could button mash the heartless in 1 just as much as 2.
The secret reports were great in both to me.
I got nothing more for the moment.