If any stages should be banned that aren't, Poke Floats should be.
Very few/no ledges, moving platforms, caves to live forever, random things to tech, random things to fall through, suicide KOs by holding people, walk off ledges, absurdly low ceiling, encourages camping, and the stage CAN KILL YOU WHILE COMING DOWN ON THE REVIVAL PLATFORM.
I can see where people would want to auto-ban Mute from the whole thing. People complain all the time about that stage. However, several top Peach players at various times have been beaten there by their competition. That and the stage doesn't have nearly the amount of shenanigans as I've listed above. It may favor Peach, Jiggly, and Samus, who don't necessarily need ledges to get back, but it's also hard FOR those characters to come back if they're knocked off the stage at certain points. You try getting down there with Marth waiting for you to come into his sword range while it's traveling back toward the starting area where there's no road to bounce off of with Peach and tell me it's always in her favor. If anything, Mute shows how the roles of Fox and Falco are reversed, where they're extremely hard to get off the stage but can be easy to keep off of it. This time it's Peach, Jigglypuff, and Samus that are hard to get off and can be easy to keep knocking back off the stage at key points of the stage.
I'm more for equal opportunity. If you're going to ban Mute, which I'm against because I've gotten first-hand proof from the many tournaments I've seen, played at, and whatnot and know it's entirely possible for Peach to lose on her 'beloved' stage, then ban something that's also far worse for more reasons like Poke Floats. ^_^
I'm still going to this no matter what happens. I know I'd prefer it to not be banned, but eh. As long as I still have fun, I won't mind a bit. Just thought I'd throw my two cents out there, random or not.
EDIT: And I see this discussion has been dead, but eh. Tired me makes for interesting introspectiveness, and it took a while to make, so I'll leave it be for now.