I think that they're worth responding to, just because of how powerfully they've spread as falsehood as to why the stage is problematic.
I think that, simply stated, the problem with Circle Camping and Caves of Life are the following: with the former, we end up with many nearly 100:0 matchups due to characters being able to get a percent lead and then very effectively run away from combat for the remainder of the match. Not only do they make for jank matchups, they're also a waste of time and not fun to watch. With the latter, the problem is that the strategy for the stage becomes polarized toward holding the cave of life and just refusing to die, due to the teching mechanics of the game.
Because Umbra's "circle camping" doesn't result in nearly 100:0 matchups, and because its "cave of life" isn't polarizing to stage strategy, these two reasons are joke reasons for the stage's banning that is only parroted by people who don't understand the actual problems with these things that make them ban-worthy. [if the stage is ban-worthy at all]
As for Omegas, if it's really music that's the problem, then we need just need to come up with a ****ing list of Omegas that are viable without copyright problems. If we can decide whether or not Umbra ought to be legal, then I think we can decide on whether Wii Fit ****ing Studio Ω should be legal as well.