Hey all!
Let's talk about the costume room, specifically the magic wardrobe and armor case. What goes in them? Well it's pretty arbitrary, mystic goes in the magic one while proselyte goes in the armor case....and void, and ham/salad robes? The armor case also gets most skilling outfits, except for the runecrafting and, you guessed it, smithing.
So my suggestion is to replace these storage options with something much more intuitive, and less like flipping around a USB cable a bunch of times until it works. How about:
A cosmetic case, which holds non-treasure trials cosmetics (clue hunter gear, minigame cosmetic sets, etc)
A combat case, which holds actual armor (void, proselyte, mystic)
A skilling case, which holds skilling outfits, graceful, mining gloves/fish barrel, etc
The end goal to all this is actually getting to find what you're looking for first try. Let me know what you think