I thought it was a very bad decision to burn Randall and Dickon Tarly with dragonfire. First, that's not what you do to POWs, and second, using fire to kill them strikes too close to the Mad King. I also wonder what the Dothraki think of offering your enemies the option to "bend the knee." I imagine there might be some grumbling about that.
I liked the fact that Gilly read the scroll about the annulment and that Sam didn't pick up on it. I know the majority of the audience was screaming at him about that, but why would Sam care about the annulment of the marriage of a dead Targaryen prince and subsequent remarriage? He's focusing on the Night King. I imagine though, at some point in the future, he's going to say: "Wait a second, Gilly, what did you tell me about that annulment thing?" and it's all going to click. Until then, we the audience know it, but they don't.
Loved Davos' line about "still rowing" to Gendry. Nice acknowledgement of the Internet's effect on this series.
I don't really buy the "let's go get a wight and bring it back so everyone can see we are telling the truth" strategy. And I certainly don't buy the concept of sending all the leaders (including the King in the North, and the leader of the free folk) to go get one. That's what you have rangers in the Nights Watch for. The idea of an Ocean's Eleven team going out there seemed a bit much. I wondered whether I was witnessing the jumping of a shark.