Why did Sansa keep quiet about Littlefinger and the Knights of the Vale coming? If she tells Jon that, he likely waits until they arrive. Her decision to keep that secret cost a lot of lives?

Where was Ghost? Realistically, I know it's a budget thing...hard to put a CGI wolf in that battle...but his absence was obvious.

Poor Rickon...needed to learn to bob and weave while running.

Who knows if all the giants are dead. There could be more in the way North. But who knows how much the White Walkers have obliterated up there at this point.

Next week will be the trial of Cersei and Loras Tyrell. It's been hinted at that Cersei might try to take down King's Landing with a stash of Wildfire. I suspect her plan may not be fully successful, but could cause some havoc. My instinct tells me that this week might be the end of the High Sparrow, and of King Tommen, leaving total chaos for when Dany arrives (next season).

Also, previews show House Frey having a big party with Jaime as a guest. Remember Arya was headed back to Westeros. I wonder if we'll see her, wearing another face, put an end to old man Walder Frey.

And then there's Bran and his visions. I suspect we'll see him return to the Tower of Joy, and witness what his father finds at the top of those stairs. R+L=J may finally be proven.