First and foremost, let us all take a moment to remember the greatest man ever born in Westeros. Lord Tywin Lannister, the King Who Was Never Crowned.

Took the words right out of my mouth. Tyrion shall pay, the West will never forget.
Now that that's out of the way, the episode was terribly disappointing.
No Val, no baby, Mance didn't fight, Gregor didn't seem to be in pain; Cersei and Jaime, for some reason, seem to have gotten each other's scripts for mistake; Jojen is dead, thanks for letting us know that he won't be important in the books; no falling out between the Lannisters brothers, no Tysha and, worst of all, no LADY STONEHEART?
Also, the scene with Sandor was a mood whiplash. His relationship with Arya was never fatherly but, one moment they're tugging at the heart strings, in the other Arya is abandoning him to slowly rot away in a mountain side somewhere.
All in all, the only scenes that didn't disappoint where those in Meeren.