Slips do load their contents when you zone. every item that can be stored inside has a 0 or 1 on the slip itself and is modified when you store items or retrieve them.
This is why augments on abjuration gear are lost when storing them and why only augmented relic+2 can be stored on slip 13 instead of both augmented & un-augmented.
You would not be able to store incomplete REMAs or JSE necks and you couldn't store any of the JSE backs or SU5 weapons at all in such a wardrobe as it would be compressed into a single bit of data.
You might like reading this post of mine, it's a slightly more plausible version of what you're suggesting.
https://forum.square-enix.com/ffxi/t...l=1#post636493