This sounds silly, but an idea...

I miss the days of seeing people in dungeons running their fun looks, instead of only using them in towns.

I believe there should be a way to apply the stats of vanities without having them equipped, limited to one per slot.

This meaning you could be wearing the 'White Lightning' Set, getting all the visuals from the White Lightning set, but having the stats equipped from using a 4 Piece 'Bone Devil' set for example.

I think this would be a good alternative to seeing everyone using the exact same gear in dungeons, and adding back that variety we have not seen in years.

I think this could work as either: A scan on your inventory and you select the effects you want, or you can select an item per slot and 'Apply' that item which then calculates Bonuses, sets etc how it currently does but does not update the Visuals.

Feel free to leave anything in the comments