Destruction Warlock spells are themed after fire, explosions etc.
Elemental Shaman spells are themed after the 4 elements of WoW.
Frost/Fire/Arcane mages is a dead giveaway.
What exactly and where exactly are the priest spells based off of and where do they get their power from? More of a lore question I suppose, but its strange that we have a wide variety of spells that don't have much in common with eachother from a lore point of view.
We have "Vampiric" spells, so we sap the energy from people?
We have "Mind" spells, so we assault the target's thoughts and feelings?
We have a "Devouring Plague" spell... Wait, that sounds like a Death Knight ability.
We have "Void" spells, so we have knowledge of Old God magic?
Then we have our 2 Shadow Word spells which just implies shadow magic is a form just like Arcane.
What exactly does a "shadow priest" do?