Something just stuck me as odd. The dragon zombie has the blue eyes like white walkers, the wights do not have those. Of course, I might be giving the show creators too much credit thinking they care about internal consistency.
Also, Arya doesn't really have a place in this new Westeros where old enemies are forging alliances. John Snow is in cahoots with Tyrion Lannister, and they're on the verge of calling a temporary truce with Cersei, while Arya is still stuck being a vengeful ball of rage. I imagine a Scott Evil scenario playing out with her.