I’m not watching season 5 (yet). Will get round to it at some point.
The books are bloody awful. I can’t remember the last time I read anything so badly written and I’m 100% convinced the reason for characters appearing then disappearing is that George is making it up as he goes. None of this planning out the whole saga in advance JK Rowling style, just make it up as you go and bollocks to narrative structure.
I’ve loved the TV series, but the basic material really does need someone else to whip it into shape.