You know, a lot of people keep bringing up the brawlers when countering sword users.
But at least all the brawlers punch and kick in different ways. They have punches, elbow strikes, roundhouse kicks, flying kicks, spinning kicks, there's just so much variety.
The only two real sword attacks are slash and stab. And all sword users don't go beyond that.
Even brawlers share similarities between them with their normal attacks that people are never willing to acknowledge but are more than happy to do so for sword wielders.
A lot of jabs are a one-two punch followed by a kick, with some altered variations. Examples: Mario, Luigi, Ness, Lucas, Diddy Kong, Wolf, Lucario, Sonic, Ryu, Pacman, King K. Rool, Wii Fit Trainer, Snake, etc.
A lot of Uairs are overhead kicks or headbutts. Examples: Mario, Luigi, Dr. Mario, Falcon, Ganondorf, Kirby, Pacman have bicycles kicks; while DK, Bowser, Lucas and Charizard have headbutts. Ness used to have one as well.
A lot of Dsmashes are sweeping kicks where they first attack forward and then backwards. Variations of this exist where a character uses their claws, tail or weapon. Examples: Mario, Luigi, Dr. Mario, Diddy Kong, Zelda, Samus, Dark Samus, Snake, all do a sweeping kick.
Bowser and Wolf are similar but they use their claws instead. Little Mac is the same but he punches. Yoshi uses his tail. And sword users also have a similar move such as the Links, Marth, Lucina, Roy, Chrom, Ike, the Pits, Meta Knight but they use their weapon, obviously.
Some Dsmashes are also split kicks. Examples: Fox, Falco, Sonic and Jigglypuff.
Some Dsmashes are ground stomps of some kind. Examples: Charizard, K. Rool, Incineroar and Ridley.
A lot of Bairs are aerial reverse kicks. Some are one footed or two footed, but their function is similar. Examples: Mario, Luigi, Dr. Mario, DK, Bowser, Diddy Kong. Wolf, Samus, Dark Samus, ZSS, Fox, Falco, Sheik, Ness, Kirby, Jigglypuff, Zelda, Sonic, Bayonetta.
Several Dairs are an aerial stomp. Examples: Dr. Mario, Falcon, Ganondorf, DK, K. Rool, Charizard, Mewtwo, Ness and Wii Fit Trainer. Some variations that differ in execution a bit are Ridley and Greninja.
When you have that many fighters in a game, creating unique animations for each one of their normals becomes a daunting task. It is inevitable that some parallels are going to be drawn between them. The execution matters more. Marth's Fair may be a downwards slash like Ike's, but you don't them in the same way.