For what it's worth I genuinely think there is worth with sometimes just saying "I don't want this character in Smash because I personally don't like them". Speculation so often sees people debate the merits of certain characters based on completely fictitious stipulations that Sakurai either doesn't play by, period, or if he does he's clearly been fast and loose with those rules. Maybe the world would be a harmonious place if we could all admit to ourselves sometimes we just don't like a thing and we can all move on with our lives. Which isn't to say there isn't merit to analysing the how and the why, to see where our biases originate, because of course irrational hatred can be toxic and wrong, but in instances where it is self-evidently harmless perhaps we can choose not to strain ourselves seeking deeper meaning where there is none. Perhaps there is catharsis in saying "I don't like thing because I don't."
I don't like Sora. I wouldn't care to see him in Smash. I've never played Kingdom Hearts. I think his character design is representative of Tetsuya Nomura trying to haphazardly mash two completely incongruent aesthetics together. He's this "cool" looking anime pretty boy but then he has big ol' Mickey Mouse shoes and it's so disconcerting and I hate to look at him. Both of those aesthetics can be fine on their own merits I but together they don't work for me and so I hate to look at Sora. Is that a good reason to not want him in Smash? No. Should my personal distaste for him invalidate the joy of the hundreds of thousands of people for whom Sora's inclusion would bring? No. Would his inclusion probably add to the net amount of joy and excitement in the world? Yes. Do I still want him to stay away from me and my family, by family in this case being Smash Bros? Dear God yes. Get out of here with your clown shoes, Sora.