As a casual player, one of the main reasons I keep coming back to Final Fantasy XIV is the great diversity of armor/weapon/clothing options. I like to change outfits frequently, and I like to experiment. I am active on the "fashion show" circuit (if there can be said to be such a thing). Recently, with the massive expansion of gear options in Heavensward, I have been on fashionista overload. My retainers and my inventory are filling up fast.

My idea is: Why not create a "Glamour Codex" which is a log of which armor/weapon models a player has unlocked, which can then be used to glamour items without having to clog inventory space on the retainers (and perhaps on your servers). This would turn Glamours into a collectible, like minions. I don't mind at all still having to use a glamour prism to actually GLAMOUR an item, but it could pull from the Codex instead of the inventory instead.

I'm not sure how complicated this would be, but it is an idea I had.