Unfortunately, ever since the books were surpassed by the tv show, the plot became a way too simplified. Plot devices started to being used too frequently, such as deux ex machinas, in order to solve quickly the problems.
There are many unsolved questions, and at the end it will keep that way, just like what happened in Lost. Only the books will manage to close out the story, as it’s the R. R. Martin’s life’s work.
For example, there was an episode that was shown to us what the WWs do with the Craster babies: they take them into their realm, far beyond the wall, to create new WWs. It was a great plot, but that will no longer be explored.
They will kill the Night King in the next episode. And man, after that, the war against Cersei will be very boring, as Sunday will be the most epic of all time. 11 weeks shooting one episode, dude. You know what’s this?
By the way, Dany, Arya, Sansa, Brienne, Jaime, Davos, Beric, Grey worm, Tormund and BRAN STARK will all gonna die. That’s my odds.