The initial pitch of "Disney meets Final Fantasy" was a dream come true. However the the Final Fantasy side has significantly diminished.
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Right now, I think the weakest aspect of KH is the original characters and plot. I don't leaning more into FF more would fix that. It would just be a bigger reminder of that flaw.
However, I'd be up for Noctis meeting Oswald the lucky rabbit, Zack teaming up with Max Goof and Webby from Ducktales, and a Squall and Mickey prequel to KH1.
not in that order but you get the idea.
kH was my intro to FF but FF took its place in my heart. im fine with more FF games instead of FF having a bigger role in KH.