I agree Dany needs more competent military advice, but I think it will come from the newly healed Ser Jorah. The last episode has him returning to Dany.
Expansion of the Night King character is problematic because to the best of my knowledge he does not talk. Besides that, he really doesn’t have anybody to talk to even if he can talk.
I doubt it will be Quaithe who informs Jon Snow of his origins. That will fall to Bran who is waiting in Winterfell to tell him when he gets back from Dragonstone with the Dragonglass. In the last episode Bran even told Sansa he needed to talk to Jon. Jon will definitely wish he had known that little nugget when he spoke to that arrogant Ms. Multiple Titles so full of herself cause of her three dragons.
The show had better explain how Cersei has complete knowledge of Dany’s battle plans or I am going to be pissed. Euron knew the exact location of Yara’s fleet, down to which ship Yara would be on. Cersei knew well in advance of Dany’s plans to take Casterly Rock and converted it to nothing more than a big prison for the Unsullied Army. Does Dany even now have enough ships to get the Dothraki off Dragonstone, or is she trapped there with her Army?
Not only does Cersei have full knowledge of what Dany plans to do, but Dany has zilch knowledge about Cersei’s plans even though she has two former members of the King’s Landing Small Council on her staff to include the one who is supposed to be the uber master spy.
All of which does create the question of whether Varys is really on her side. The question is whether that is a real question or just a question they want us questioning?