This is going to be fun…
KH- Give Kairi more screentime/development. Show her in some flashbacks, and give her some interaction with Riku. After Kairi is rescued, I'd have her go back to Hollow Bastion with the FF characters and have her help the other PoH hold back the darkness.
CoM-I’m fine with the overarching plot for the most part, but I would like to have been given a bit more insight into the Organization. Explain why Marluxia/Larxene want to take over, for example (this could/should have been covered in Days, to be fair). Part of me wants to have Mickey as a traveling partner like Donald and Goofy, but I can see why they didn’t; there would be no sense of danger since he can kick everyone’s ass, lol. And I think Riku’s storyline in that game also works better if he’s alone. And yeah, get rid of the scent thing. I completely forgot about that until Absent mentioned it. I also would have Riku's worlds be more substantial. Instead of just boss fights with no context, I'd have him reveal his memories of those worlds/his experiences in KH1. We never did fully see his side of the story.
KH2-Do more with Roxas. Have him play a role throughout the game, with Sora gradually remembering things from Roxas’s life, or Roxas trying to take over, or something, anything. Have the events from CoM gradually return to Sora over the course of the game. Show what Namine/DiZ/Riku were doing. Integrate all the Disney worlds into the plot better; make the Organization play a stronger/more apparent role in the world plots (I don’t think second visits should be necessary, honestly). Get rid of the Maleficent subplot completely, or have her resurrected at the end of the game, or have her play more of a role in the overarching storyline. Also, do more with Kairi. Show her interacting with HPO/the Organization members. Make her getting a keybalde a bigger deal, like maybe she has to overcome a big challenge or something and it comes to her instead of it being literally handed to her.
Days-Oh boy. I would rework this one from the ground up. Xion did not have to exist in the first place; her plot could have,
should have been given to Roxas. Roxas should be the one gradually remembering things from Sora and begins to have doubts about the Organization. I would give some focus on the Terra-Ven/Xemnas-Roxas relationships. Heck, all the Organization members should have been given A LOT more screen time than they actually did. That being said, I would be ok with Xion (or a Xion-like) character IF she was treated differently in game. As in, the entire plot doesn’t revolve around her and her wangst, and she remains strictly a supporting character while Roxas’s personal journey remains at the forefront. Also, a different origin is a must for her; no more nonsensical Sora clone BS. DiZ and Riku could have also had bigger roles; they could have acted like the antagonists of the game.
BBS-Develop TAV’s relationship more. Instead of the MX-Terra fusion I would just have Terra give into darkness and eventually become Apprentice Xehanort after his memory loss. Make the worlds that are supposed to have people more populated. Not have all keyblades be knockoffs of the X-Blade. Get rid of the idea of keyblade inheritance ceremonies entirely. Show more of the apprentices (and AtW) on RG, and Kairi and her grandma. Develop Ven more. If he had enough darkness in him that allowed Vanitas to be created at age twelve (?) I would like to see more of his backstory/his character pre-split. Give Aqua more of a story besides just chasing after Ven and Terra.
DDD-This game would not exist, since MX would die in BBS. Notre Dame would be saved for a future game where it would get the justice it deserves. If the game had to exist in some capacity, it would be completely reworked and the only thing that stays the same is the idea of traveling into sleeping worlds for the Mark of Mastery which eventually gets sabotaged somehow. Kairi would go with them to the tower, and learn how to use her keyblade.
I think if we got to go through the town and learn of the tales of the Beast, and have Sora go through the town defending him, Gaston would be able to make his grand entrance into the scene, where he would serve as the primary antagonist and final boss of the world. Gaston later is revealed to also be working with Xaldin, Xaldin doing the work of warping the Beast's mind in order to psych him out and make him rage. I think if this happened in KHII I would have been soooo much more invested in Beast's Castle!
This would have been great! Since he didn’t show up in KH2, I thought for sure Gaston would appear in Days. No one gets ignored in KH like Gaston, apparently lol.
Spoiler
