Originally Posted by
Mjollnir
Suggestion:
Keep *all* gear in an armoury section of your house, curated by an enthusiastic CACTUAR. When you select a given gear set from the menu in the field, your CACTUAR teleports your old gear back to your armoury and your new gear is teleported onto you.
You have to drop the gear off at your armoury for this to work, so gear on your person would still take up inventory space, worn or not (as it does at the moment), and this gear could still be equipped manually or by macro if necessary.
Your armoury is initially limited to a couple of dozen spaces, but can be increased through quests that are unlocked by levelling up in different classes and/or by crafted expansions to your housing, as mentioned.