I don't know why anyone ever thought Daisy would have a chance. She's been in exactly one actual non-spinoff game ever, and that came out before I was born. And she wasn't even in the sequel to that game. The only real legitimacy she has as a character is as Luigi's counterpart to Peach, but aside from how objectifying that view is, it also fails to realize that Luigi's true love is Peasley.
Which reminds me of that kid I saw on Miiverse the other day who was talking to Sakurai like "I know I said I wanted Fawful and Popple to be separate playable characters, but I've been thinking it over, and I think I'm mentally prepared for the possibility that they might be a team character."