I think I've said this before, but I've soured a lot on Maisie over the years. I loved her performance in the first two seasons.
Now, I know the show isn't exactly as period-accurate as the books, but Maisie acts way too "modern" now. I have a similar problem with Brienne's character in the show. She's written with modern society and movements in mind.
This doesn't bother me so much because I feel like the show is pretty consistent in modernizing everyone. The show treats pretty much everyone, at least among the protagonists, as modern people dropped into this world. I feel like that's been a kind of necessary component in connecting with the mainstream audience well enough to be as big of a hit as they have been. The only place where I feel like it's gotten a little heavy-handed is the Faith's extreme homophobia, and even then that's mostly because it's detracted from spending time on their populism, and because it's hinged so heavily on their bizarre tokenization of the Loras character.