It would be pointless to this comic. I'm guessing that much of it is going to be a generalized view to grasp a larger audience.
Paradise Lost isn't considered a canonized work. It's someone's interpretation and hope to convince men about the ways of God, in particular why his actions are so.
Lilith, I have no idea. There's mentions of her in the Bible, Isaiah 34, I think, but I know nothing of her character.