I thoroughly enjoyed that series!
I did want to go back to the prophecy, however.
I know the Raven King seems to have rewritten it, but the prophecy seems, for the most part, to have come true (other than the magicians "failing," if "failure" means the killing of the Gentleman). I'm still wondering about the meaning of the first magician in the prophecy (who I think I feel fairly sure is Norrell) burying his heart in a dark wood beneath the snow, yet still feeling its ache. When did this happen? Unless this is in reference to Strange burying his "wife" who was really the moss oak? But all the other clues point to Strange being the second magician.
Anyway, I echo others' calls for more of this story (especially to learn more about Childermass, who I find fascinating), but will also be content if this is where they leave it.