I'm beginning to believe they should just repurpose the armoire for this...

Making it available only while in an inn room of housing will prevent any issues of 'data transfer' as they won't ever have to pull up this data unless the player is in a small instanced area and won't need the data to be changed until such a time as they're using it.

That would require that we have to manually add everything to the glamor armoire... But I think it's a small price to pay.