I think both sides have said enough about their points and for some reason Riot decided to rule in favor of the red fans. Although I'm personally the fan of the original setting (not only because I like pink better, but also the other settings of the skin work well with pink), I find it meaningless to just post the repetitive opinions again. Therefore, I want to choose to compromise and offer some of my humble ideas:
KOI NAMI's Red
If Riot has to change the pink to red, can you use the red as Koi Nami's body? That would look great since I personally find the current color is just to bright and it's "red red" and looks really boring. KOI NAMI has the red that's red and dark enough to fit the blood moon theme while still being elegant for a champion like Elise.
"THRESH's Gold"
Since the original skin was designed to be pink, the purple/blue color and yellow-gold legs really go with the package. However, since you changed it to red, can you also make her gold legs more like the gold that you used in Thresh's blood moon skin? That one looks more "Champagne Gold" instead of "gold gold" and works very well with Thresh. Or you can simply use the goldish color on BM Elise's spider body (the mask). I don't think it's a good idea to change it into other colors tho. I know gold is also part of the blood moon theme :). Also, the little spiders also need some changes since their queen is different now.The models are different and I'm sure there is a way to make them look different than her classic skin spiders. Moreover, I don't mind the blue because her hair is blue and her skill animation has blue in it.
I really really really like her Blood Moon Skin and don't think it is a good idea to change her skin name since BM is sooo cool she deserves that instead of lotus order or heart seeker. I really hope riot can see this and take my ideas into consideration. I really think this would look really good and it could be a solution that meets both side's tastes.
Sincerely
Happy Holidays! Let's wait for the final Blood Moon Elise to revel herself!