Demonic Presence now also causes your Arcane, Fire, Frost, Nature, and Shadow damage to be dealt as Chaos instead, and increases that damage by 11.2%.
Demon Hunters cannot do frost damage with any skill, why specify it in this manner? If it is truly intended to only affect Demon Hunter abilities, why not just specify that all magic damage from abilities now deals Chaos damage?
I understand the reasoning is to specify that physical damage is not included but they could make it clear its for abilities only.