I would have liked a more creative variant as well. I think they wen't with the black and white color scheme to make him look like how he does when you fight him in Timeless River in KH2 with his past self. I think it would have been cool to get a Captain Justice/Dark variant based on his BBS look!
SO many people want the original characters, including myself! What is weird is that Disney owns the rights to characters like Sora, Donald, and Goofy, so I think Square Enix's approval is the only thing holding them back. Funko could also only be focusing on the Disney characters right now to test the line out and see how popular KH is as a brand, and they'll release the original characters down the line if these do well (which they have been as far as I can tell). Heck it wouldn't surprise me at all if pops of Sora, Riku, and Kairi ended up getting revealed at the D23 expo or something.