He also mentioned something fairly interesting.
I've called the Druids hypocrites quite a bit over the last year or so since Cata revealed that the Druids used the waters from Moonwells, which were explicitly arcane.
It's been revealed that Moonwells, which we see in Cata are from the Well of Eternity, are no longer Arcane magic either, but more a nature based magic.
So whatever Elune is doing to the Moonwell is actually fundamentally changing magical energies from one to the other.
That's some pretty cool stuff, especially considering how chaotic arcane magic is.
Moonwells are specifically (spiritually) associated with Elune. They are fundamentally nature magic based. :)