Yeah Qyburn... bit of an enigma. May well have necromantic tendencies. It seems like Cat is still pretty... articulate for a Zombie. Maybe the Mountain, and any other zombies, will be coherent and retain skills from life. That makes the Mountain pretty damned fearsome. It also makes you wonder what other "dead" characters may reenter the story.
I really hope that Arya and her story effect the outcome of events in Westeros. I mean I really want her to get revenge. I want her to be a true assassin eventually with skills that make her capable of murdering the corrupt. She has been kind of helpless for a long time. It creates a sense of horror in the books, which I like, but I think most of the readers would love to see her kick some ass as the story progresses.
Also, Brienne is awesome. Really looking forward to her in Season 2.