Cancelling people's self-expression is the stupidest idea I've ever heard for an MMO and if they ever add such an option I think that'd be the final straw for me to quit the game.
It wouldn't even be more 'immersive'. Have you *seen* what you look like without glamours? Basically clown outfits and nothing matches most of the time.
Let people continue to express themselves and get over it.