Thing that bothers me about Cersei right now is the Faith Militant and the High Sparrow in the books iirc were like a snap judgement made during the time when shit's all crumbling around her.
The king's gotta help us says the Sparrow. I can't fucking arm you, but how about you all just deal with it yourself. The book made it seem like she had just outmaneuvered the High Sparrow into the pocket of the King by currying favor but did that shit in ignorance in a way that leads to all kinds of otherblowback without her realizing it.
Show version's basically this bitter old bitch who used them as a proxy to fuck up Loras and snap back at Margery. The Sparrow even warns her that she's about to fuck up way more forward than in the books, that this shit isn't answering to the King. In the books it's like she misjudges him for some overly pious dude when he asked to be armed. In the show he's straight up with her about the plan
she puts out and yet she's still like
lol do youSparrow:

Cersei:

Net effect is the same in the end I guess, but it feels more satisfying the way it seems to play out in the books to me. Whatever tho