If your argument FOR or AGAINST the new design involves there being a "lore reason", then that's not a good argument
Not trying to start yet another big debate about her design, but I just want to point something out to the multiple comments I'm seeing that are either justifying the new design claiming that the upcoming story will explain it, or people arguing against it using existing lore
HOYO MAKES THE DAMN LORE
Whatever the lore says doesn't matter because they can and have made changes to suit whatever they want to explain next
If they wanted her to suddenly be a massive mech, they'd make the next story be about how she's basically immobile and needs a mech to fight
If they wanted her to be a boy, they'd explain that's how she's been remade or something
No matter what changes they want, they can just add some new story points to justify it
I'm not trying to invalidate either side here, you're welcome to like or dislike the new changes, but please stop referencing something from existing or potentially upcoming lore as a justification for your argument, because none of that is set in stone, and can be changed to suit whatever Hoyo as a company wants