Maybe one of us is misunderstanding the other, but I wasn't meaning they should make the existing belts visible. They would however need to make the slot visible if they were going to use it for a general glamour slot, so I guess that would mean deleting the visible model of any belts that have them? Assuming that hasn't already been done to save data.
Ah, I wasn't meaning functional wings when I said they could go in the belt slot - was thinking of "dress-up" costume wings. Like that other topic about the angel and devil costumes, with people wishing they could have just the wings or just the coat - wings as a 'belt' item would solve that.
(I did bring up in a different topic that functional wings-as-a-mount would be great, but I think that would have to be an "either/or" situation - either implement costume wings that can be equipped, or functional mount wings that only appear when "summoned", but not both to avoid weird double-wings when wearing the costume piece and using the 'mount'.)
But yes, glasses are maybe a tricky thing for this idea because they already exist as headgear and you'd have to duplicate them - and I don't think you'd just want to move them all over to the other slot, because people might want to wear "glasses and bonus item" but no hat - but I think completely new items that don't clash with existing item slots could be more of a possibility. Although then, as Vstarstruck said, if the old belt models are still in the coding and would all need deleting, perhaps they see that as work they don't want to have to undertake. Or is there possibly a risk of missing/breaking something? Do some NPCs maybe still have visible belts on their models?
I guess another issue for the designers would be - suppose they do implement this idea. Now *some* costume sets involve a piece that goes in the belt slot, and others don't. Is this okay? Do they now need a belt-slot idea for every costume? Will people ask why some things in that slot are visible and some aren't? Perhaps that's why they'd be hesitant to do it even if it could be really useful in some ways.