Yeah this. It's complete bullshit.I don't see where the "casual vs. competitive" viewpoint comes from. From my own casual perspective, it wouldn't matter to me if rage didn't exist or if KDI/VI/whatever was just DI or didn't exist either because I'd play the game in the same casual way as always. I don't see why there's a "casual" viewpoint that gets invested in the argument of whether these are good mechanics.
If anything, I just see a lot of, "Don't critique the game! Just like it for what it is!" in this thread instead.
A few competitive players might say some angry vile stuff, but you have to realize it's mostly concern and passion for the new game. We want this game to be good competitively. Sure we could play Melee or Project M instead but we want to play Smash 4 instead or in addition to past Smash games.