arya and brienne meeting/duel is my favorite scene of the entire show. sure it had silliness, but it was expert in actualizing many seasons of character development. we finally got to see what arya can do. more importantly, we finally got to see other important characters get to see what arya can do.

regardless, it may bite her in the ass. littlefinger is significantly more well off having that arya information than otherwise. maybe arya will be done in by her arrogance at some point, maybe not. probably not except perhaps the very end of the series since grrm's wife will murk him in divorce court if arya dies.