I'm going to assume Arya's comments are related to Sansa's maneuvering around little finger,
Exactly. Littlefinger was poison in the veins of Westeros. Getting the better of him took a bit of doing... though Stark women were his kryponite, so maybe he was heading for a fall no matter how 'clever' Sansa was. She survived Joffrey and Bolton as well, but only because she was of strategic importance.
But part of Sansa's problem isn't the character, it's the actress. I have the same trouble with Bran because (as I think I've said elsewhere) the less you move, the more acting you have to do to hold attention. Wish they'd taken his supernatural growth spurt as an excuse to swap him for someone else.
Still, that's not their fault; young casts are always a gamble, and none of this spoils my overall enjoyment.
Oh, and I think the dragon riding 'roller coaster' trip was either a sign that HBO are going to open a theme park, or a sign that Snow needed a crash course in dragon riding for an imminent battle scene. Or maybe he sneaks off to assassinate Cersei when no-one's looking, which could account for why the series is so short.

Of course she'd say she's preggers, he'd hesitate, what with being so Starky, and The Mountain would do him in while he was looking conflicted. Then The Hound would suddenly appear with Daenerys on her dragon, Hound takes Mountain, Black Queen and White Queen get into stalemate when it turns out they're both pregnant, then they agree to a truce so their kids can marry and rule together.
Meanwhile, Arya sneaked off and takes the Night King's face with her Valyrian dagger, which saves a fortune in battle special FX.
THE END
I could have saved HBO a fortune.