Man, I'm just gonna rant about something.
No seriously, I hate the current use of the Miis in Smash. Three movesets with mostly generic moves, with some fresh ones thrown in (mostly looking at Brawler). And the cool new moves some of them got? Easily could have gone to other characters. Hell, at least two of Swordfighter's specials perfectly fit Chrom, not even including the Counter. And Samus could have easily gotten a few upgrades from Gunner.
Not only this, but with the K. Rool thing, it just shows that the Miis were basically used as a cash grab and a cop out for other characters. "Anyone could join the battle," after all. A character being stuck as a Mii costume isn't "the next best thing." It's a cop out. "Just make him or her a Mii!"
I like the concept of a Mii in the game. But the execution, in my opinion, was terrible. There should have been one Mii. It should have actually done things from its games. Tomodachi Life, Wii Sports Resort, Wii Play...hell, any of the StreetPass Mii Plaza games. A quirky style with comical animations. Man, if I made the next Smash, the changes I'd make...
So yeah that's my rant.