I'm not so sure it's as simple as all that, though, because that's what a game sequel does: it takes the characters, the world, and the gameplay, and develops them further. If FFX-2 hadn't changed up the characters, gameplay, and battle system, then people would have complained that they hadn't been given something new. That is kind of outside the scope of my argument, though; my intention here was mostly to look at in-universe factors.

I wasn't trying argue that Yuna didn't have agency in FFX; of course she did. But part of writing characters with agency is giving them room to grow, change, adapt to new situations, and as I said in #4, above, that's what I see happening to Yuna between the games. I know not everyone agrees with me here, and that's fine, but I think there's room for multiple interpretations on this point.