Do what was the purpose of Arya's time spent and the house with the black and white door???? Seriously??? Fuck the show writers for wasting my time with that bullshit. I don't mind a slow build up, but what I will not accept irrelevance.
Well that girl that was whooping her ass is gonna try to kill her now. And arya still benefited from the training she got while there. It's not irrelevant as of yet