Why did the give the Lunar Empress skin to Lux?

Don't worry, this isn't complaining about the fanservice. It just seems like a better fit for Lunar Empress would be Karma. After all, Karma does seem more Empress-like, and since it's the Year of the Dog, it would also go well with the saying "Karma's a bitch."

Anyways, just my thoughts, but the Lux skin seems pretty nice. If I played Lux I'd buy it.