MysteriousSilver
Smash Ace
I honestly think there was an intention to make a number of stages noncompetitive. There are so few "middle of the road" ones, and 3DS Japes no longer has Claptrap on a timer (I believe he now appears at random) pushing it decidedly outside of legal status. It's frustrating.It's interesting how a lot of stages with interesting mechanics go just that little bit too far and end up unliked for competitive play. I think there's a balance to be had between hazard fest and flat + plat that's still competitive quality. Wii Fit Studio and Coliseum, for instance, have nothing wrong with them beyond the fact that they're both walkoffs. If their platforms were transplanted onto the Omega form, they'd probably become legal overnight. (Woolly World is probably in a similar boat, if you shrink or remove some of the platforms.) If you nerfed Mom on Gamer so that she only stuns players instead of damaging and killing them, she'd become an interesting way of extending combos and rewarding pressure (remember that she breaks shields) that's heavily reliant on stage positioning. Standardize the layout and it would be perfect.
And man oh man does this game need a small neutral stage like Yoshi's.