I think there are certain helmets or other pieces of gear that look cooler than others. And some seem to go well with different pieces. A cool idea would be to let us use an item that we have or discarded to make our currently equipped items look like them, but keep the same stats of course. This would be purely cosmetic, and I'm sure other players wish we already had this. It could cost us something like a blue engram of that specific type to convert it. Or just plain old glimmer.