Man, I feel like so many characters are going to have unsatisfying conclusions to their stories. There's so much to fit into these last 6 episodes.
Like there's the whole war against the dead, the war against Cersei and the Golden Company, CLEGANEBOWL, Theon's redemption, political drama with Jon's heritage etc.
Like how are the Stark children going to have a satisfying ending? They've basically been the protagonists since the first episode, and now that Arya and Sansa have risen back to power in Winterfell I feel like there's not really any time for them to do much of anything.
Maybe Arya and the Hound can team up and tag team the Mountain, then afterwards Arya can slit the throat of a cowering Cersei.