I mean, you can. Said changes were absolutely arbitrary to the point you can just give her the same idle and running animations as Peach and nothing of value would be lost since again, those slight hurtbox differences don't mean a thing in an actual fight where the standard player isn't going to be sitting idle or running much instead of floating.
Hell, she reverts back to Peach's idle when holding a small item! Like....when she's holding the goddamn VEGETABLES.
She could have easily been an alt just like Alph, but they decided do the absolute bare minimum to make her "different" for no legitimate reason.
That is what pisses me off the most. Because then what's really keeping them from giving a single new idle animation to Alph just to have him separate from Olimar if that's literally all it takes? Or tweaking female Byleth even further on hers to where the hurtbox is different?
And what makes Daisy so special that she gets her own while Lucina, Dark Pit, and Ken don't?
Regardless of how people that like her feel, she's the absolute most pointless addition in the entire series thus far and I'm tired of pretending she isn't.
Ooh... I can't imagine feeling so strongly about such an inoffensive character.
"They made her separate for no reason" no, the reason is that they wanted Daisy on the CSS, not tucked away into Peach's alts. They wanted to market Daisy as a new character, and they did. Again, Sakurai explained that
echo fighters don't need gameplay changes. They're a bonus, not a requirement.
Her idle animation is not an arbitrary change, it reflects her energetic personality. Peach kinda stands there, Daisy is ready to go. This is reflected in her run animation as well, where Peach holds her dress so as not to step on it, whereas Daisy doesn't care and just makes a run for it. I should mention this is a distinction that's also present in Mario Party.
Why she gets her own idle whereas Lucina and Dark Pit and Ken don't? It's simple. Those characters' personalities aren't different enough to their partners' that they justify non-attack animation changes. Lucina impersonates Marth and they both have the same bland characterization (at least in Smash), Dark Pit is a literal clone of Pit, and Ken has the same fighting stance as Ryu even in the SF series. Sorry, but this is kind of a dumb question.
Is she the most pointless addition in Smash? By a purely utilitarian standpoint, yes. But characters are more than functions.
Don't forget that Daisy's spirit/essence has been in Smash since MELEE, with Peach's second alt costume. This means there have been people who wanted to play as Daisy in Smash since 2001. And Ultimate!Daisy is a manifestation of that.
Does she have any legitimately meaningful differences from the character she's Echoing?
No? Then she's pointless as a separate fighter. End of story.
Being "iconic" is not a free pass. Either give her SOMETHING different or don't bother having her be separate. That isn't such a tall order.
Again, echoes don't
need gameplay differences, we already know that. If she were pointless as a separate fighter they wouldn't have added her. They probably knew Peach mains (especially long-running ones since Melee) wouldn't want her to share her costume slots with another person, and that Daisy fans who have been clamoring for her inclusion all these years would at least want her personality to be done justice. This is the Smash team being mindful of people's requests, and we're still not happy...?
I feel like most semiclones wouldn't work at all as alts outfits (like Toon Link as a alts of Link would make no sense at all). As for total clones like Richter, Daisy and Dark Samus, what's the point of putting them as alts costumes? You're not even saving development time, there's pretty much no difference in having Daisy as an alts aside from the fact that the devs don't have to make 8 alts for both Peach and Daisy.
This!!! Why would the team spend an admittedly small, but still significant enough amount of time making a whole new Smashified design for Daisy, unique particle effects, unique non-attack animations and facial expressions, only to tuck her away as an alt, and not be able to market all that stuff as cool new additions? The amount of effort to make Daisy happen was small, but not zero. If they were gonna make her, they'd push her as a new character no matter what.
And also, as a longtime Peach fan & main, I wouldn't want my precious Peach to have her costumes cut in half just to accommodate Daisy. And I also wouldn't want Daisy to be stripped of the only thing she offers; a second flavor of Princess, a distinct female face in a series that desperately needed it.