I'd like to say that I find this a lot more fun & interesting than the original...
Before the TV series I noted all the fuss about the books, and read the first one. Noted the familiar GRRM 'introduce then kill characters for effect' method, and decided it was pseudo-medieval power-politics of limited interest. Good characterisation, but nothing novel. Too many mad characters. So, read no more books, couldn't be bothered with TV series.
Mixing in Pathfinder (DnD) magic, and bits of weird mythology, with this writing style, makes ASoIaF much more worthwhile!
I'm... not completely sure, as an author, I approve of the way you seem to be using D20, but, you seem to be making it work...