If I wanted to be uncharitable I could also call the "Live your story" tagline misleading.
You're not playing "your" story, you're playing the Warrior of Light's story. A pre-defined character whose personality, reactions and decisions you have no control or even influence over.
Now obviously I didn't go into the game expecting that, but the tagline might give someone the wrong idea, when "Live your story" really only pertains to everything you do outside of the actual game story.