I actually love this idea that Arya would be disguised, although the way it's portrayed in the show, I believe she has to go through a process of taking the face off of a dead person in order to turn it into a wearable face, right? So I don't think she would've been able to put on the face of a living person... It would've been more interesting than what they did with Bran, though. Which was essentially ...nothing.
I do think the idea that 'there's no plan except to fight until everyone is dead' is a mischaracterization, though. They have a planning scene where they explain that all the troop movements count for nothing unless they can lure the Night King down to the ground. The whole point of that battle and the choices they made about how to arrange it is to thin his numbers but give him a sense of security. There are several moments where Jon has to hang back and not help people, both on his dragon and off, in order to try to get to the Night King.
I'm sure you know that this is actually another trope, and not only of fantasy movies. The idea that there is a massive battle/heist/deception that all the characters you know and love will have some role in, but really it's all an elaborate distraction to accomplish one central thing. In this case, they try to subvert the trope, because everything seems to have been leading towards the stereotypical Jon vs. Night King final battle, but in true GRRM fashion, he actually has a powerful lady rise up instead. I think the show actually did a pretty decent (not flawless) execution of what GRRM's bullet points probably said.
For me, the execution failed with Dany. I actually had a really hard time buying her romance with Jon the whole time, and an even harder time buying that he'd suddenly lose the ability to ...make his soldier salute... after he found out they share 25% of their DNA. Come on. In medieval cultures all around the world, brothers and sisters used to marry, much less 1st cousins or more distant. And we've seen Dany deal with having to separate from everyone she loved before. But now since she can't get Jon's big, magical ...direwolf...she snaps and decides to just murder everyone? I mean, soldiers, fine. Her enemies, okay. The men of Westeros, I could see it. But fireballing women and children? It seems horribly mishandled. I can only assume that the broad strokes come from GRRM, but the execution was heartily unconvincing.
Anyone else feel that this series lost the plot (literally and figuratively) in the final episodes?