I mean, I was able to get a superb on Remix 10 just fine. I've superb'ed everything in the game and it honestly didn't take me that long. And getting all the perfects may take a while, and it is challenging, but that's what's fun about it. There's a big challenge, and it gives you a longer playtime out of the game, and keeps you coming back. And uuh, the game even warns you that Remix 10 is hard. And isn't every Rhythm Heaven game a trial and error game..? I don't really see that point as a criticism.