I honestly think the Star Wars pack was a big mistake (I don't mind the Build/Buy/CAS) as I am an occult/fantasy/sci-fi player, but I am not interested in the gameplay of this pack.
If they were going to do a fantasy collab (but maybe they shouldn't have at all, and kept it Sims canon), it should have been like Harry Potter/Fantastic Beasts, Alice in Wonderland/Through the Looking Glass, or LoTR/The Hobbit. I think RoM is the best occult pack, and there was still complaints of it coming up short. But I didn't even try Sims 4 till L&D (and bought with RoM/Vampires).
From what I see there is a balance of realism vs. occult players, as some players admit they like both, and some realism exclusive still don't mind getting some occult packs like Vampires for Victorian Build/Buy/CAS.
But I think Fairy occults were the least favourite occult, so that might be why EbN fell short. I mean I tried a fairy, but I am a spellcaster/human player. I think that EbN/CoL are great complimentary combo, and I believe CoL is a favoured pack for both realism players and occult players.
I do think that if we get a pack that give Genies/Djinn, update Mermaids (like an ocean exploration pack and giving them an ability tree), and/or update make PlantSims a perma state with ability tree they will do much better than fairies.