Mushroom Kingdom U has Nabbit, who can randomly capture people and kill them. Then there's the transformation where water spouts randomly appear and they sometimes have enemies, not to mention the icicles from above.
Mario Circuit has a nasty ceiling that players can repeatedly get damaged from in a certain phase.
Luigi's also has ceilings where you can constantly attack enemies, and I remember trapping Karst in a series of utilts he only escaped due to his partner saving him.
Norfair has lava that randomly eats half the stage, and then there's the tidal wave of lava.
Woolly World is alright, but the transformation here could give certain characters like Mac huge issues.
Orbital Gate Assault is Poke Floats.
Kalos has a lot of hazards way more obtrusive than you'd think, with turning characters metal, flame pillars and swords that can attack if you're unlucky, water sweeping in like in Distant Planet, and a dragon statue firing off random energy bursts. They shift the focus of the match way more than Halberd imo.
Gamer's layout is random, and the mom deals a fair bit of damage when you're spotted. My issue isn't with the mom, but with the random layout that can make adapting to this stage difficult.
Garden of Hope has monsters come in every once-in-a-while and you can be trapped in the pot thing. Also the stage is plain huge, so if Big Battlefield isn't allowed this shouldn't be either.
Windy Hill is alright, but the side blast zones are pretty close to the stage and that spring hazard can kill. Also, it's huge as well. Maybe this could work in doubles?
Those are my thoughts right now, feel free to offer any rebuttals to them.
While I agree with every of your points, the problem that arises is whether or not, all of those points are valid enough to ban the stages. These stages are most definately not neutral, and that's where we have to determine their value as to being able to be picked, whereas their hazards are randomized and detrimental enough from a fair fight, in the same way Halberd isn't considered (by the community at large even though there are huge dissenters) an actual threat. I think it's all about stage positioning being more favorable than regular neutral stages, and how you got to adapt to them.
I'd like to say that I also don't agree with all these stages at first glance, especially roofed stages.
MKU is a weird one for me. The transformations I think are excellent, even the rotating platforms in the castle area. It allows for dynamic style of play, but never a transformation that will kill any aggresiveness like Pokemon Stadium 1, or Wuhu does. However the hazards that exist can be detrimental to play and I'd love to test them out. Nabbit is a threat that can only kill at very high %, while it provides a type of wall where you can push your oponnents towards. Urchins are the biggest problem for me due to the way they interfere with recovery options. The icicles are always telegraphed and the extra platforms aren't a direct threat. I'd love to test it out a bit and actually see how the hazards affect 1v1, I'm still undecided on it.
I agree on Luigi being a terrible stage because how combos work and because it provides safe areas that make koing extra hard. I don't like it and I'd be hard pressed to make a good case for it.
Norfair I think is a fantastic stage. No central platform, and lava floor and walls make for very interesting dynamics that can be used for your favour, plus it can make for some serious tight battlefields at times. The tidal wave can be very easily dodged, and the platforms allow for lots of recovery options while in this game you can't ledge spam like in Brawl. I'm very much in favour of this unorthodox stage, my only small gripes are the lava blasts that sometimes come out of the walls.
Mario Circuit has that phase with the ceiling that both provides combo opportunities (in case of un techs) and protection for vertical koing. But it's only a momentary phase that I think lasts around 15 seconds, just as there are stages like Delfino's that has the blastzones change, there's also this that allows for vertical protection for a very limited time once per match. There's also a phase with one wall on the right side that also falls in the same category for me, it's a little bit more problematic but I'd put it in the same way walk offs exist. There's no difference between offensive like stages like Delfino, Halberd or Castle Siege and defensive stages like this one in my opinion. The karts might be a problem, but I'd love to test how much they affect the fights. I'm very much in favour of this stage, I love it.
Wooly World as you mentioned, also seems like a great stage. Sure it provides Mac a huge disadvantage, but as a Mac player you always have the ability to ban it. I just need to see how much it affects aggresiveness, because if players have no incentive to go in (a la PK1) and the other part is a walk off then, I don't think it should be played. I'm partially in favour of it.
I think Orbital is amazing, 5 different transformations, with the arwings being able to tilt and move around a bit, similar to lylat in that regard. I really wanna test this stage out because I think it can actually be a great choice on 1v1.
Garden of Hope's monsters should also be treated as Halberd in my opinion, The only problem I have is the bridge where you can get stuck under it if Pikmin build on top of you, but I need to see how fast they come out and build it properly. I'm in favour as well.
Kalos, I agree, hazards are way too much, but I'd love to test it out a bit more in friendlies, while Gamer has the randomized layout and short roofs, which are a big nono for me personally, plus mom can start getting really fast after some time goes by also making it super random.
And as for Windy Hill, due to the licensing issues I suppose it's never gonna see tourney play and I agree the spring is what's also what's having me doubt it, It still seems like a cool stage.
Oh and Pkmn Stadium 2 is a weird one due to the effects it has, I personally hate it but I don't know if it's actually a good idea to actually ban it completely.
