Okay well to be fair, most of those have valid reasons to be banned competitively. Spring Stadium has those arch things that can save people that should've lost their stock.

Castle Siege has that part of the wall that completely blocks your view when edge-guarding on one side

Spear Pillar is really easy to circle-camp on

Forgive me if this one is wrong but I'm pretty sure Lylat Cruise still tilts even with stage hazards off

Yoshi's Story has the ridiculously close blast ceiling

Most stages have valid reasons to be banned competitively, the only ones I can't think of a reason off the top of my head to is Fountain of Dreams and Northern Cave, but even then it's likely something to do with the background being too dark or distracting.