If could add anything with no restrictions to the game.

[Toutatis]

Small thing, but you know how they put a check mark on items such as minions or orchestrion rolls if you've already learned them? I wish there was a similar kind of symbol to let you know that a piece of gear was already in your glamour dresser. It just gets annoying having to go all the way to an inn room to see if I have something that looks neat first before realizing I already have it (or maybe multiple versions of it)...would be nice to know right away if I need to make that trip or can safely desynth or turn it in to the GC.

Right click on the item-> search for item. If you have it in your dresser, armoire, inventory, armoury, retainers or chocobo it will tell you.