I disagree, for me the echo idea would be too disappointing and underwhelming to see her like that for me especially since I already feel underwhelmed with Daisy. I've already said that I rather not have her than an echo I'm not going to happy playing as.
Playability is the most important part. The difference between a character and an assist trophy, a character and a spirit, a character and a Mii Costume. Playable characters are broadcast to the masses and the general public, to millions of people who aren't heavily invested in Nintendo. Everything else that falls below playability is ignored and fades into obscurity outside of their dedicated fandoms. The only exception to this is Waluigi, who's only been able to escape this due to his star power in other Mario spin offs like Mario Kart, which sells better than Smash anyway. Dixie doesn't have that screaming fanbase that Ridley and K. Rool had to launch her into Sakurai's view.
Dixie being playable means she gets to be introduced to millions of fans, she gets a place in fan art, fan animations, comics, tournament scenes, official promotions, her influence spreads considerably and she gets an incredible boost of stardom. Look at K. Rool and Dark Samus and what Smash did for them. Look at what Smash did for Fire Emblem and Kid Icarus.
Yes, gameplay is important. But it is not the only factor. I'd rather she get in at any means necessary.
Her being a full echo is incredibly unlikely anyway, she wouldn't be Daisy-tier, but more Chrom/Ken tier at the very least anyway.
I don't think Dixie as an Echo is an intrinsically bad idea, but what does make it worse is the fact that Sakurai won't change her initial moveset ever. The dude's really stupid in that regard. So the question becomes whether to have her now as an Echo and be done with it, or to wait for her to be able to be unique. That really depends on how willing you are to wait, and how good her chances are to be unique down the line.
I don't want to wait for the next game, that's for sure. I want her to be in the Ultimate roster with no cuts.
See what happened to Krystal? Everyone thought she was a shoo in for Smash 4. Then her popularity waned and now she's lucky to get in as an Assist Trophy.
Pretty dangerous to assume Dixie's popularity won't wane even further. Even in this DLC cycle her place among fan polls dropped considerably, to the point she's losing to characters that used to be far below her. Characters that have all the same points against Dixie when it comes to DLC, some characters that have even more against them, are now all winning against Dixie.
Honestly, even now, we're just repeating the exact same arguments we've had months prior because there literally is nothing to talk about. Other characters get their leaks and hints and enormous dicussions and fan requests and Dixie barely has anything in terms of contemporary speculation and discussion in the community. Part of the reason some people here are OK with her being an echo is that that is literally the only time she appears on anyone's "wants" lists these days, as part of a potential echo fighter's pass. I hate to see her being ignored again and again, but alas, we should be more vocal outside of this base if we want this to change.
Also I don’t think stupidity is a part of it as much as the fact that the roster is so enormous at this point that adding new characters and bringing back so many old ones just takes so much time in it of itself that changing every character’s movesets might not fit in time constraints. And despite this, several characters did have their movesets updated from Smash 4 to Ultimate.
At this point I'm more concerned about Dixie getting in at all than about her being perfectly represented. Chrom and Ken have shown us that characters can differ considerably from their inspirations and still "count" as Echoes, so a Dixie Echo would probably still have some moves where she uses her ponytail, and that would be fine by me. Although a semi-clone like Isabelle would still be preferable.
Couldn't have said it better myself.