Who are you more likely to blow cooldowns against: A DPS in full Darklight gear or one in full Direwolf? It isn't as if games haven't let you cover up PvP gear before, and players with a good set often don't change their appearance (my experience in Tera comes to mind), but it isn't as if there's no reason to keep them that way. Given how SE has already made it so that you can't even see your opponent's names or emote at them, it wouldn't surprise me if they wanted to keep you from being able to mislead them with gear appearances.
