You could have a more world focused story in ARR just by removing the player from the chosen one/main protag role. Instead you would remain a simple adventurer. Gifted with the echo perhaps but not chosen by Hydaelyn. You'd still come across the scions, but instead of them becoming the "main cast" they'd have their own narrative unrelated to the player. This would mostly be focused around how they work towards their goals of eliminating the primal and Ascian threat, with the player helping out here and there. However the player wouldn't be tied the Scions and would spend much more time dealing with the Garlean threat than they do in the current ARR narrative.
This shift in narrative would allow for the player to learn more about how Garlemald affects Eorzea early on in ARR. During the course of these adventures the player would of course also have ample opportunity to take time to help the common folk of Eorzea, and in the course of doing so could choose to learn more about what ails them and how they live their lives. This would create a much more down to earth narrative.
These changes would of course kill some of the story momentum without some minor character adjustments. So naturally the competence level of the Scions and the City State Leaders would have to be bumped up a bit to provide that, and Garlemald would have to be more of an active threat.