Are you bloody serious Elexia? First off they had the /display oh already in the patch notes a few patches ago so I don't understand why it didn't make it in game. Secondly, being able to control the way -your- character looks is incredibly important to any game, hell its important in any aspect of life. The way you present yourself tells a lot about a person. (You are presenting yourself as an arrogant prick BTW.)

Simple toggle commands are most likely not that time consuming to make. Its not like your character needs any new graphic animations to be programmed for toggling, its just your character with the client not displaying an item.