"I would argue that they already have both essence and emotion." Zell said. "You may be their extracted emotions from when they first were created, but as time has passed, they seem to have developed them back.
I have seen anger, fear, and joy from a god. Maybe not as strong as the emotions of a human, but still there. When I killed Steve, he felt fear and his mother felt rage towards me. When I fought him a second time, he attacked me out of vengeance.
They have emotions but have no souls. I know there is a difference because the gods I gave souls to were truly different and able to gain free will. So, killing you will do nothing. I can still change your fate, and make you belong.
You will no longer drain the mana around you because you will not be a hole in creation."