I've watched those four episodes yesterday in one sitting. I was thinking how this show became no more than average. And totally overrated. I'm thinking book readers aren't happy either. Acting is just mediocre, with lone peaks here and there. I must say I prefer Vikings at the moment. A lot more tension, authenticity and in my opinion better acting.
I don't find the acting mediocre. I think it's actually quite good compared to most of what's on mainstream television.