I bet a couple of the characters who appear dead/out aren't. Too many loops to close at once. Not one loop was permanently closed, even though the assumption is they won't make it past whatever event in that episode.
Arya isn't out of the game because she's blind. It's temporary or she will get some other powers that makes her a blind bad ass. Something will happen that allows her to continue.
Theon/Sansa aren't dead, survived the fall.
Jon gets revived.
Stannis was given mercy when he said "do your duty", Brienne somehow didn't think it was her duty to kill him, instead it was personal so she didn't.
Cersei will recover and get power again.
Margaery and or Loras survive prison/trial.
Dany isn't captured.
Pick two of those and you're probably right, with the obvious conclusion holding for the rest.
You must have only read as far as the first sentence in my post, so I'll try to make my position clearer: I only care about Arya and Tyrion. I realize there are dozens of other characters and plotlines going on. I personally have lost interest in every single one of them. I care about exactly four things: Arya, Tyrion, White Walkers, and Dragons. Everyone you listed? I do not give a single solitary shit. I don't care about Theon or Sansa or Jon or Stannis or Brienne or Cersei or Margaery or Loras or Daenerys. I used to. I've lost interest.
Actually, I think I've figured out what it is. This show is at its absolute best when it takes two people who don't really belong together and puts them in an awkward pairing, generally involving travel. Jaime and Brienne. Arya and The Hound. Bronn and Tyrion. Jon and Ygritte (and the other wildlings). Arya and Tywin. Or scenes where there's two people matching wits, like Tywin and Tyrion, or Tywin and Olenna, or Tywin and Oberyn; really anyone trying to match wits with Tywin was pretty awesome. But the pairings this season have been shit. Brienne and Pod? Dull. Littlefinger and Sansa? Promising, but Sansa is still too prim. Tyrion and Verys? Lasted for 15 seconds. Tyrion and Jorah? Lasted for 12 seconds. Tyrion and Dany was promising, but we got basically one episode out of it before she disappears. Cersei and the High Sparrow is just uncomfortable. Ramsay and ANYONE is uncomfortable. Jon and Tormund was legitimately awesome, but they've been split up and one of them is likely dead. Jaime and Bronn had so much promise and it was wasted on Dorne, which is legitimately the worst storyline the show has ever had. Without the unexpected magic delivered by those unlikely pairings, the show has stumbled, and it seems like the people who are sticking around are dull and involved in uninteresting stories.
So, yeah, I was a bit disappointed in Season 5. Which is to say I still think GoT is one of the absolute greats. But Season 5 was the first time when I can really sit back and say "this isn't as good as it used to be."