She is every bit as good as Tyrion Season 1.
He just got more hype because he's a midget throwing out witty quips and everyone loves that kinda stuff.
Arya Stark carrying scenes with Tywin is like when Sally Draper goes head to head with Roger Sterling and shines. For a young girl to pull that off takes such skill.
She went God Mode the second she become his servant.
I feel like Jon Snow is under-rated as a character and actor. As a character he stands for every lost or confused kid who signed up for wars and pledged their allegiance to a cause they knew nothing about; they just knew they weren't alone anymore. As an actor he plays the part with such subtlety that you forget he's acting, that he's not some lost young man looking for a place in the world. THAT is the sign of a good actor, when they can make you forget they're doing it.
He doesn't have a plethora to work with but always manages to amaze me with what they give him. Then on episodes like this and the last, when he gets major scenes, he just kills every one of them. His dialogue is gruff but filled with purpose, his shame and fear and honesty are palpable across his face, I cringe every time he's put in an uncomfortable position or logic is thrown in his face because the truth is that he's perfectly suited for the wall. He's not as wise as Robb, as clever as Arya, as Courageous as Bran, or even as ambitious as Theon. He is a walking sword with ideals that are not his own.
--
Realo won gold at the Sex Olympics with a BROKEN FRIGGIN NECK.-Voltch