They seem to have missed the point with Arya. She kills a fuckload of people and goes through absolutely terrifying hell in A Clash of Kings
. In the adaptation of that book, she killed nobody and lived a nice, comfortable life where she got to have smiling chats with Tywin Lannister. Still, the actress playing her is amazing so her plot is still watchable.
Catelyn is the most butchered character of all. The strong, icy book counterpart was turned in to a mopey old crone that got about 3 lines in the entirety of Season 3 before her death episode. Why Littlefinger would be obsessed with her in this continuity, is beyond my comprehension. Still, they've got some characters very much right. I love show Jaime, Varys, Melisandre and Davos.
For another random bitch, I'm gonna call out the bad casting of Jojen Reed. Supposed to be a kinda dirty, rough kid. In the show he's bizarrely posh and private school. Not a big deal, but it confuses me.