I suspect:

That's an interesting theory; but it's doubtful if the Starks are capable of playing that kind of multi-dimensional political game.

What it probably means is that people tend to fall back behind a ruler who is perceived as decisive and strong. Cersei has somehow to managed to present herself as both of those things. In any case, even if people are unhappy with her, there is nobody in KL to lead a mass revolt.

There's no way Cersei should/could be trusted. Tyrion has seemingly lost his ability to see all the angles.

Has Theon already left Dragonstone? I didn't see him in Dany's map room.

Varys has been rather useless as a spymaster this season. He completely missed the alliance between Euron and Cersei, and the movement of Euron's fleet to Casterly Rock. I guess he's lost all his agents in King's Landing.

I suppose the Dothraki are inspired by the Mongols; so I was surprised that they did not have a lot of long-range archers.

In Dany's defense, none of her advisers is an expert in war-planning. Tyrion is a diplomat-cum-politician, while Varys' area of expertise is intelligence-gathering (although he's been rather useless in this season so far). I don't know why or how Missandei was promoted to chief advisor. Grey Worm is a super-soldier,…

My frustration with Bran's story is that he is not making any definitive, clear statement about the Night King; in fact, he's hardly making any statement at all. He, like all other fortune-tellers, speaks in riddles (which gives him a certain deniability, I suppose).

What that battle also showed was that Dany is not quite an air ace (yet). Other than pressing the "fire" button, she just lets her fighter-cum-bomber pilot itself, which is why it got shot. She should've targeted the AAC battery after narrowly evading the first shell!

But was the battlefield really that far away from Dragonstone?

BOOK SPOILER ALERT:
.
.
.
.
.
.
.
.
.
Joffrey stole the dagger (when King Robert and family visited Winterfell) and gave it to the assassin to kill Bran.

I see Yara's failure as more of an intelligence failure than her incompetence as a naval commander. It was supposed to be Varys' job to keep track of what's going on in King's Landing. Why did he not get any information on Euron's arrival at KL with a 1000-ship-strong fleet, and his alliance with Cersei? If he had…

Is he good at anything other than sword-fighting?

So far, Daenerys' advisors have been rather incompetent. Varys does not seem to be gathering any intelligence about enemy troop movements; while Tyrion is better as a diplomat and administrator, but sucks as a military strategist. And when did Missandei become the chief advisor? I thought she used to be Daenerys'…

Objectively speaking, I wouldn't mind if Qyburn succeeded against dragons. This guy is a scientist, for god's sake, who is looking for secular (this-worldly) solutions to problems posed by mythical animals. If he were given enough funding and lab facilities, I suspect he could come up with a solution to the…

Does anybody else think that Dany/Tyrion's idea of conquering King's Landing by laying a siege is going to backfire? If food supply to the city is going to be cut off, who is going to suffer the most - the common people or the nobility (who know the war is coming and probably have some supplies stored away)? If Dany's…

That cross-bow looked like a prototype. If Qyburn orders multiple copies of them to be manufactured and installed on Euron's ships and other strategic points in King's Landing, then they can do some real damage. As one commenter has already noted, Danny's dragons are big and strong, but they are not the most agile…

Is anybody on Dany's leadership team aware of Qyburn's secret dragon-slaying weapon? I mean those dragons are essentially Dany's only selling point; and if they are out of commission, then all she's left with is an army that's poorly organized and not entirely battle-tested. Dorne sat out the War of Five Kings; the…

Tywin Lannister was a 3-in-1: administrator, politician, and military strategist. Tyrion "inherited" the first two qualities, while Jaime presumably the last one.