Well my main thing is about Ridley is his flying and when I do think about it just literally flying to dodge every move or whatever would piss anyone off. Plus i'd be annoying constantly jumping in the air just to hit a ****ing purple pterodactyl :/. But then they'll always be those people who won't really fly or anything but just do whatevs. Another problem I have is just seeing him scaled down just wouldn't work for me and don't get me started on Bowser he basically has magic or Kamek making him big an plus he's always either small or big which makes some sense actually. Now....Counter me O:
Let me try as well, why not?
It would tick some people off, that's for sure, but that's not a real reason to not include Ridley. There would still be higher skilled players that could easily deal with him. Projectiles is what could stop his flying in his tracks, and I doubt Sakurai would make him worse than Meta Knight was in Brawl.
I can understand why you don't like the idea of him being scaled down, but his size seems to have varied throughout the Metroid games anyway, it wouldn't be much of an issue or change, really.