Ah yes, feels like it was yesterday she got revealed... I'm honestly not big on her design, I feel it's fairly restrained for what should be a more unhinged character. I like the concept of her being a child leader to contrast with Peach, ordering around Wario and Waluigi like they're her overgenerous dads, but obviously none of this was shown in the game itself and I'm just going off what her design communicates. Personally, I already thought Waluigi was pushing the unnecessary boundary somewhat, and I feel even more so with this character. I understand why she didn't make it in, even if another female character in the spinoff cast would have been welcome to see. However... I also think there already was a character who could've fit that Wapeach role quite well, on top of being more fleshed out to begin with. Maybe she was already too disassociated with Mario for them to consider her, though.