Having Dixie as an echo would severely disservice the character and all the fans that want her BECAUSE she’s unique. It wouldn’t feel like Dixie at all if she controls the same as diddy. Using Dark Samus for comparison is a bad example regardless of the situation, because more people actually want Dixie and are more long term smash fans anyway. If Dixie got in she’d be unique, or at least a semi-clone, not an echo. Like many people have said, the characters that are echoes exist because IT WORKS. Just go look at Diddy’s moveset and tell me you want to screw both characters over when that moveset doesn’t remotely work for dixie. It goes completely against her character, which is why she has to be unique. Besides, seeing as Sakurai is a stickler for details, it would probably hurt him more to include her as an echo, than not have her in at all.
Seems like using Dark Samus is a bad example in this case because you care about Dixie and not Dark Samus, honestly. You seem to imply that Dixie fans are true smash fans but Dark Samus fans aren't, sounds a bit rude to Dark Samus fans tbh.
Also, I stand by the fact that Dixie as an echo actually works pretty well. With a bubble gum gun that doesn't charge but shoots quickly, hair gliding as a double jump and DK's Up B except with her hair spin from DKC2, and a grab like DK's except picking up with hair... I don't see how it's so insulting of Dixie for her to jump at people, spike at people and kick at people like Diddy.
Sakurai IS a stickler for details, but he's also a game director. You're talking about the man that added Ganondorf as a clone of Captain Falcon just to be able to add Ganondorf and please his fans. On that note
The whole character plan was proposed in one go. Time constraints appear as development goes. Dixie, if she is in, was likely decided to be unique or not when the character plan was made, so her development time, if any, is not taking from anything else. This is the point I'm trying to make: character importance and priorities were decided in one go and ONLY under exceptional circumstances a unique character would be downgraded to an Echo. From this point of view, I fail to see the developers sitting down in 2015 and thinking they should make Dixie an Echo to free character space and save development time. They judged their importance back then and that was a deciding factor whether she would make it in and in what form.
You are judging this from the point of view of "oh she can be an Echo, so let's make her one to free time to make room for more unique fighters". In your own way, you are also prioritizing character importance. Make room for more unique fighters? You imply there that other characters do deserve to be unique. There are not many absurdly significant (Nintendo) characters that deserve to be in. Dixie definitely does, so why can't she be unique? Why does her moveset potential has to be sacrificed in order for someone else to make it into the game? She can be unique because she has moveset potential and is important, popular, requested and relevant enough to be so.
And again, you cannot compare her to the other Echos. None of them have contributed as much to their respective series as Dixie Kong has. Echoes are added to increase the roster size with popular, yet not overly significant characters, and their fans should be happy they were included. If assets were not shared with other characters, they wouldn't have made it. Dixie Kong is not like any of these, and her being considered for Brawl is proof of this, the plan of which did not consider Tropical Freeze and was likely heavily weighted on her contributions to the DKC era.
Let's agree to disagree
Character plan being proposed in one go doesn't mean they won't consider factors like time, cost, nor does it mean that the plan they set out in 2015 went to swimmingly well that EVERYTHING in it happened exactly as planned.
Believe me, I say this as someone who works in the game industry... Game Design plans change A TON over the course of years. It's why we had Robin and not Chrom. It's why the Gematsu leak from Smash 4 wound up being inaccurate. It's why there were a group of forbidden 7 in Brawl.
It also makes no sense to assume that as they were looking at the game plan and looking at the poll, they didn't realize just how many characters could be echos and set apart a bunch of them to include in the game as lower priority IF time and money allows. Again, this happens a ton in the game industry, features and ideas that get tossed, put into a document, and only if time allows they happen, otherwise they get punted.
Lastly, you keep going back to "but Dixie is more important than other echoes"... but, AGAIN, that's not what this is about. This is about being realistic as to how these decisions are made. It also makes us sound like blind fans if we act like our character is the most important ever, like no one ever was... Did you know how huge Chrom was to Fire Emblem and reviving that series? Do you know how few people outside of Nintendo circles know about Dixie versus how many of them recognize Daisy because of Mario Kart? We're speculating on who's more important or meaningful based on what WE know about these characters, but maybe that's just not reflected in the greater gaming community.
I think it'd be healthy for people in this thread to start realizing that while Dixie may be a huge deal to us and while she may grow in fan desire post-K. Rool, this attitude that she's too important to be an echo is a bit lofty, and detrimental to the fact that if she makes in it as an echo that should be a better outcome than her not making it in because she's too "unique"
And sure, we can agree to disagree, but I hope more people are understanding how silly it looks to look down on Echo inclusion when your character isn't even in the game yet. Especially since Dixie making it, even as an echo, means that much more people in the world who will suddenly know who Dixie is and possibly play her games.