It was really weird how they handled that, I was expecting us to get big reveals about the White Walkers/Night King and Bran/The Three Eyed raven this season but we learned basically nothing new about them, I was sure it'd come up again after episode 3 but it didn't. Nor did we learn anything about the lord of light either.
This is my biggest issue with the series as a whole. The very first scene of the whole series was with the whitewalkers.
Yes, the political drama was interesting and everything, but kings and villains kept coming and going every season, but the inminent threat that there was something else bigger than them all and their petty desires and greed, was always looming on the horizon. Since the very first episode.
So it was a HUGE disappointment for me when they were dealt with at the beginning of the season, because everything after that just felt.. pointless. No sense of danger. No sense of dread. Nothing.
It felt as if, after defeating Sauron in LoTR, Aragon and the other kings had spent one more hour of movie fighting each other for Middle Earth.
What they could have done instead is that when Jamie arrives at Winterfell and tells them Cersei isn't keeping her promise, Daenerys realises that she's waiting for them to be weakened by the dead and then she'll wipe them out. So she decides that dealing with Cersei can't wait until after the dead have been dealt with and she leaves Winterfell to march south and take the Iron Throne. Jon strongly objects to this as this leaves Winterfell vulnerable to the dead. They march south anyway, episode 3 they have the big kings landing battle but Daenerys doesn't go on a rampage and instead heads straight for the keep. After the battle is won however she does execute every Lannister solider, Jon/Tyrion etc tell her to show mercy but she does not. Jon leaves with some forces to return to Winterfell while Daenerys stays behind at King's Landing for a couple of days to solidify her control of the capitol. Episode 4 would take some of the scenes from Episode 2 of the actual show, and would be an episode of everyone there preparing for the Attack from the dead, Daenerys does not arrive. Episode 5 would be the big battle at Winterfell, Daenerys does not arrive until the dead begin to breach the walls of Winterfell, when she appears with Drogon at first the fighting north men and wildlings think they might have a chance to turn the battle around, but then she starts indiscriminately burning the living along with the dead. It was clear to Daenerys that the battle was lost and anyone still living would soon be her enemy, marching with the dead. While she is burning Winterfell the Night King arrives at the garden to kill Bran, Arya kills him etc.
Episode 6 is similar to what we got, except it takes place in a ruined Winterfell rather than a ruined Kings Landing. Sansa is furious and due to her outburst and threats Daenerys has her arrested. Jon confronts Daenerys, not before being stripped of all weapons by the unsullied. He asks her to let Sansa go, she refuses and then they argue about her leaving Winterfell, putting the Iron Throne before saving lives, destroying Winterfell and burning the living along with the dead. Meanwhile Arya is talking to Bran about what he can see, and asks if he can see the future and if Sansa will be ok, he gives her a knowing look and the scene cuts back to Jon and Daenerys arguing. Grey Worm enters the room and Daenerys then threatens to have Jon executed too, revealing her plans for Sansa saying that she has made it clear that she will never accept Daenerys as her queen. Grey Worm approaches Jon and then holds out Jon's sword for him to take. "The man who passes the sentence should swing the sword." With that it's revealed that Grey Worm is dead and it's actually Arya in disguise handing Jon his weapon, Jon Kills Daenerys. Wrapping up stuff happens.
Shat that out in 10 minutes, with a lot of refining I think that'd have been a better season overall. Daenerys' motivations are a bit less confusing than her just losing her freaking mind, and the Night King stuff happens at the end rather than the final battle being some one-sided confusing slaughter.