I just wanted to post this forum post from MMO-Champ I read a while ago. I think it explains that Elune is far more powerful than any Naaru. It feels like if they came out and said she was something other than a God it would be a retcon. It just feels like the only reason they even suggested that was because of the fan speculation, and that blog post on that other fan site.
Arnorei:Correct... but it's a theory to which the devs direct the people asking questions about Elune. I remember some years ago the same question was asked, and the answer was that Elune is a goddess, the only goddess known in the WoW universe. It was after BC had came, since I started playing in BC and started following the lore better since then.
Now, to same question, the answer is that Velen said she might be a naaru. So the answer is that, Velen said it's a naaru. The answer is no longer "she's a goddess". Look at all the answers, they're clear, and this one is quite clear too, "you want to know what's the deal with Elune? Well that guy, Velen, can tell you.". It's more then a theory now. And to add on this, in previous expansions for example it was a theory troll had that night elves are troll descendents. And what do you know it's true. And it was a theory of one npc that humans are descendants of vrykul, it showed a weaker vrykul child and his conclusions were lore. Mind you, I could have said oozes descend from vrykul as the curse made them softer by the year until some were so soft they became oozes. I could be right, can't I? And if I was an npc, I would be right automatically it seems, with not further check from anyone.
Also, someone asked what makes Elune a Goddess? Good question, and no, Maghda can't be a goddess.
Elune is a goddess because she's immortal, she has powers with which she can even stop wars or give boons to her allies, she can help heal others or shield them from harm and she created a race of demi-gods, the Cenarians(keepers and dryads), she created another race of thin air (the moonkins) and morphed one to resemble her (the night elves). Maghda or a rock can't be gods because they're not immortals and they don't have power over life. Not even the titans are immortal, not even the naaru, shown by Bridenbraid's quest. But Elune is, shown by the quest in Ashenvale where the satyr takes out his heart to save the little girl and not only does he not die, but he's also changed back to night elf. If naaru were so powerful, why don't they change the broken and lost ones who kept their faith in the Light even when it abandoned them back to their former selves? It is clear there is both a stigma as well as physical and mental problems associated with being a broken or lost one, and they're only so because of the use of fel magic from their enemies. Them, the broken, were only trying to protect the weak, and for this they now suffer? They are now weaker then they were? And the naaru do nothing. Because they can not. But Elune can, and she showed she can. The naaru can't bring back the dead, they can merely make their trip to "the other plane" easier. The naaru can't cure fel infestations, they can only ease the effects. Elune can, and has done so. Elune has brought a satyr back to life, Elune has healed incurable gashes through Tyrande in War of the Ancients book. Elune transformed a satyr into a night elf. Elune transformed trolls into night elves. Elune made moonkins from air. Can the naaru do any of these? No, they can not.
Also, someone else mentioned that maybe she made night elves resemble keepers and dryads. Ok. And who do keepers and dryads resemble? I already said that since night elves did not exist before keepers and dryads, Ysera can't be the mother as, even if she chose a mortal form, a night elven form did not exist since the night elves did not exist. Plus, it is more probable they'd have been half-dragons then half-humanoids. So, by logic, dryads and keepers can only resemble their true mother in their humanoid part, Elune. So Elune can only have an upper half at least of what looks similar to a night elf. Elune can't have looked like a troll, since trolls are radically different from night elves except some minor things left in the evolution (ears, skin colour, and that's it, as trolls even have their body covered in a thin lair of hair, night elves only have hair on their head and their eyebrows and beards for males).
Plus, it is shown that in the ... ahem... "bonding" of two different species, the created species isn't radically different and the "bond" isn't full. Centaurs, sons and daughters of a keeper and an earth elemental. They look like dryads and keepers still, like their father, but they have different colours, more earth-like and are closer to the earth in their magic and beliefs and their faces carring the "ugliness" of earth elementals (really, look at them, the females even cover their faces). So dryads and keepers can't be fundamentally different from either parent, and since Malorne is a stag, we know which part is his. In this moment, Elune can only be a humanoid resembling a night elf.