What do you want to see in the Katagami (vanity) system?

[Quiz]

Transmogrification is what WoW uses, you go to an NPC and pay in game currency to make your current armor look like another piece you have acquired, so you retain both pieces but just change outward appearance, can be undone for a small fee. Transmute is a more permanent and involved process, that combines two pieces of armor into one. You keep the stats of the higher level armor but gain the look of the other piece, however the old piece of armor is destroyed in this system. Alternatively, some MMOs such as LoTRO, EQ2, and Rift have simple "false" or "vanity" armor slots that override the appearance of the currently equipped armor. That system is fast, easy, and requires no use of in game currency to switch looks.

Ah, ty. Those latter ones you listed is how I expected XIV's to be. Addition tab in the character screen or extra equip boxes on the equip screen to just drop the vanity gear onto.