Cloney characters have been in every Smash Bros game and I expect that to never change.
Most fighting games also have clones.
Yes, Smash is different in many aspects, but still retains similar concepts at its core.
Clones are no different.
With the exception of Ganondorf (who himself was a very exceptional case even compared to the other Melee clones), all clone characters actually make a lot of sense being clones. Those characters are inherently similar to the characters they're based on.
Dr. Mario - Mario with a doctor suit
Falco - Fellow Star Fox pilot
Young Link / Toon Link - Younger version Link / Different incarnation of Link
Pichu - Baby form of Pikachu
Roy - Fellow sword-wielding Fire Emblem series protagonist
Lucas - Fellow PSI-using EarthBound series protagonist
Lucina - Blood related to Marth, disguised as him as well
Dark Pit - Literal clone of Pit, possesses the exact same physique and combat abilities
She just feels unneccesary, maybe I'm just miffed that the roster was disappointing to me
Now that's something I can agree on.
Ah, it's human nature to find a scapegoat for whatever wrongs they perceive...