Race for the Iron Throne is a great blog for looking at A Song of Ice and Fire. You Win or You Die - Historical and Political Analysis of Game of Thrones by Steven Attewell. I have concluded ASOIAF is my favorite series, despite Dany's dragging and some of the sex scenes reading as laughable.
Here is the address. https://racefortheironthrone.wordpress.com/
The blog basically goes through the books chapter by chapter, and analyzes each, looking at the basis in history and myth. It looks at how the show did the scenes in the chapter and the writer says which he thinks is better.
He says his problems with Stannis in S5 here. https://racefortheironthrone.wordpress.com/2015/06/30/stannis-endgame-book-vs-show/
On Tower of the Hand he has written essays on the monarchy of Westeros. https://racefortheironthrone.wordpress.com/archive/hollow-crowns-and-deadly-thrones/ Part IV - Two Brothers, Two Visions of Monarchy is one I have looked at the most so far, as it looks at Renly and Stannis' opposing views of monarchy.
Great blog.