Springkink isn't a good evaluator of what's trending in fandom. For example, I can guarantee you that all the Hope/Vanille prompts came from one person who, while being very enthusiastic about the pairing, does not do them any justice. Additionally, Fang/Vanille does not get the shaft. It's one of the lemming pairings of the fandom. Meanwhile, I can count the number of Hope/Vanille fics out there on both of my hands.

I also take issue with your assertion that Vanille is gay (she's not, it's just fanservice) and "she's like that with everyone" (She's cheerful and friendly with everyone true, but she has specific chemistry with Hope), but I don't have the energy right now to go into more depth.

I agree very much with the rest, however. I particularly hate anything that breaks up Snow/Serah, if only because of how dedicated Snow is to her.