I don't see you could say all of those different effects and then simultaneously claim they didn't lead to any variation. Because they did.
I don't see how they're going to allow for all of those effects. They can't simply have a perk that makes your destruction spells AOE, because what if I don't WANT an aoe destruction spell? What if I want to kill one guy and dominate another? What if I want to cast a Fury on Target in an AOE to get a bunch of bandits to fight each other?
I can't see this realistically happening without spell making.