Before I discuss Yuna, I'd like to address one issue about the guns...
I'm confused about how the hell they actually work...
In battle you can get shot and survive, but in FMV's and such, guns are as dangerous as they are in reality? I guess they're magically weakened when in battle...
And as for Yuna...I like the clothes and stuff. It's called character development. She's still frail, still innocent, but at least she don't dress like an old lady.
And her using guns...very unrealistic. You're telling me that in two years she developed the skill that takes some people a lfetime to achieve? She's a perfect shot, and has many abilities beyond that...it just doesn't make much sense. But as always with FF or rpg's...magic is the universal explanation. *sigh*