Well, there is no such thing as a truly original idea 
But it does frame Bakker's description of Earwa as a metaphysical who-done-it quite nicely. Gives a motive to the question of why Hell exists and leaves the "who made it this way" open.
Lol, I found that out when I started reading posts here! Thought I was so clever--you, Wilshire, Madness and the others have me beat by YEARS!!! Grossman ain't got shit on Bakker tho. But I did like The Magicians as a kind of grown up and warped Narnia/Hogwarts.