Originally Posted by
Triceron
So, that is actually a gameplay abstraction.
Lunar magic is not really 'Arcane' magic, since the lore is that the Night Elves chose not to dabble in Arcane magic and instead chose to take up Druidic nature magic and worshipping Elune. If Elune's magic were truly 'Arcane' as described by gameplay, then we have a massive conflict in lore. By that standard, I wouldn't factor in a gameplay explanation of a spell school to be anything more than an abstraction. I see it more as a general 'element' classification rather than anything deeply connected to lore, just like how the Frost magic between a DK and Mage come from different sources, and more appropriately the DK's own variant of Frost should actually be typified as a form of 'Shadow', since they use are using necromantic Runes to generate this type of power. In the game, it is literally just abstracted as a different spell school from Unholy for the purpose of not having all your abilities locked out of you get Silenced. Same as 'Arcane' spells being locked out, allowing you to still use your Nature spells.
If they want to add in Arcane or Fire or Frost spell that heals, they totally could. We just haven't had a direct example of that in any class yet, that's all.