I dunno... If you're just suggesting random collectibles that encourage exploration then... Hmm, the game already achieved this with the achievements for obtaining all Aetherytes. If you've ever bothered to go after them all you can discover most of what Eorzea currently has to offer. And as far as I'm aware, the maps will be explorable/unlockable and tied into achievements. Am I interested in exploration? Yes, absolutely, and I'll probably do it anyway without the incentive of "collectable loot" with no significant worth or use and which will probably just take up valuable inventory space anyway.