For me Extremis was by far the best episode of this series, maybe even the best in Capaldi's whole streak. I love these complex narratives and the theme was great. I saw no dodgy Moffat ending, but then, never jumped on that train really, I know it sometimes ends a bit too well, but intercourse the penguin, there are far worse things on the telly if you ask me
I also felt good about Baldy (whatshisname?) for the first time, that allowance to kick is great! The non-surprise surprise was OK.
Maybe I am too much of a fanboy to see the bad things talked about, but I hope I won't be as alone as in my lonesome crusade on the TWD side