searing hot take
people who had their favorite characters mii'd should just be happy they made it into the game at all
only geno and waluigi fans get to be salty (and i'm only one of those things)
Depends on the character.
Cuphead, Shovelknight, Minecraft shit, Geno, Goemon, Sans all work almost perfectly as Miis costumes. They look great and fit the character aesthetics. I LOVE Goemon and was pumped to see him added as a Mii because the costume looks really great and the MiiFighter style fits well enough with the character.
Others like Dante or Dragonborn don't really fit with the Mii style all that well. I wouldn't want either in the game that much on my priority list, but they don't really fit the Miis either.