I can definitely see where you are coming from, because it’s a PVP game.

The problem I see is if a cosmetic chest can only directly correlated to a regular chest or a large chest, then how do you account for items that take up more space? I’d prefer to see fixed size (footprint at least) and material costs per number of slots and have the available items vary in what size they are, but in a fair and proportional way.

A “real” item is a lot more appealing than some illusions trickery. And a making an illusion of a cabinet that is 4x the size of a large chest but only holds as much as a large chest kind of makes the item useless.