My main complaint is that they needed to give Arya a few lines as she was leaving The Hound to die. I know they were trying to go for the she's a freeballing badass now vibe, but that's not the vibe that they got. And I know they don't want to show The Hound dead, because they probably will re-use him or at the very least they want to tease that they will reuse him.
That was the weakest, imho. Sometimes you can leave it hanging in the air like that and it's effective and sometimes you can't. It's not the actors fault, they both sold the shit out of that scene. It's the writers themselves. Sheneededa few lines. That scene came at the cost of her character.
She did put his name on her "list". No matter what they're trying to insinuate she's thinking, she's betraying something. Sloppily. All she needs is a few lines it changes from betrayal to decision. Which, I think, is what that scene was intended to be about -- Arya's decision. But the way they wrote it it was just about Arya's indecision.
Edit: Hell, they could have done it with a word. "Suffer", after she takes the coinpouch and starts walking away. Two words if they wanted to be ninja, "Vala Mhorgulis". Three words if they wanted to get SUPER fancy, "Suffer and Die".
But then Arya gets really and truly dark, not cute-campy Little Girl Against the Unfair World dark. Can't have that, I guess.