I feel like Clefable has been hindered more than helped by becoming Fairy instead of Normal
It's got more weaknesses that are seemingly carried by more things and it doesn't get STAB on Double-Edge anymore
Moonblast is alright but I feel like everyone's got Fairy-resistant teams to counter the general hype
Fairy type is beneficial to her overall, and that is definitely why you're seeing it the other way. I'm running Sludge Bomb over Spore on my Amoonguss on wifi doubles just so I can slam the hyped fairies for supereffective damage, even though Spore is such a good move. Also a popular/amazing doubles Pokemon is Togekiss. Being able to now use Follow Me to draw in fighting attacks and
quad resist them is a powerful new tool, but I've got Poison Jab on my Hariyama (who subs in for Amoonguss when I use him) to handle that.
Once fairies become just another type you won't feel as easily exploited.