What Happened to K/DA Kai'Sa?

A while back, when K/DA was first announced as something which would be happening, Kai'Sa was essentially the flagship. Not only was she the face of the reveal, but she was also to be given the Prestige skin- the first in what was to be a new trend of artificially rare skins designed to give their owners, well, prestige. Go figure.

Here's the thing, though- Kai'Sa is by far the weakest member of the group now that K/DA has seen its full release. Think about it in the context of release and the music video for Pop/Stars, and the personality the video gave to the champs.

• AHRI- The leader. A subtle yet alluring figure, clearly important, the outward face of the group.
• AKALI- The tomboy. She's the badass of the group, has a dominant personality but plays to the fringes because that's her style.
• EVELYNN- The mischievous one. She plays off of Akali, enjoying the havoc she creates while staying distinct and flaunting her flamboyant style. Larger than life (literally).
• KAI'SA- Well, she's definitely there.

Seriously. Every champ had their thing: for Ahri, it was the laundromat sequences, for Akali, it was the neon spray paint in the subway, and for Evelynn, it was the outward diva, inward deviant duality that they played up by making her a giant in several scenes. But Kai'Sa? Not much. She was just walking through the tunnel, seemingly as an afterthought relative to Evelynn.

So my question is this: what happened? How did Kai'Sa go from the face of the skin line to a complete afterthought? Kai'Sa doesn't have much personality in her base skin, and that's no different in Bullet Angel, so I was kinda hoping this skin would give the champ some flavor, but that just turned to a big no dice. Anyone, especially the dev team behind the skin line, any light to shed?