The Four Swords adventures in the Zelda series had four players. That's... kind of like that.
As for Smash Bros. Brawl, I thought the complaint there was that Sakura (I say Sakura because he was the "star" of those SSB updates, to the point that it seemed like he was the only guy working on the game) was more interested in throwing in random extras than how the game played. I never got the impression that the Masterpieces were where he focused his time. I got more of the impression that he was including an endless number of songs.
But you know, I don't play competitive Smash Bros. and I don't know what a wavedash is, so any gameplay faults go over my head. Is the game slower than Melee? Maybe, I don't know, but it's still difficult enough as-is at times. I do get the feeling it's not as awesome as I thought it would be, but that's likely because Melee already exploded expectations and that this was more of the same - a game that explodes expectations, yet it wasn't as much of a leap over Melee as Melee was over the original.