Vanity System in PvP

[Obreck]

As someone who has played MMOs that allow vanity costumes in PvP I assure you nothing would change. No one uses costumes to mislead others in said MMOs simply because it doesn't work. Anyone worth their salt will identify by your weapon/mannerisms. No one is fooled by wearing gear that doesn't match your level. The costume variety differs little from what people wear in PvE.

Its already been done, the only thing that happened was the paranoid people panicking about how it would be exploited went silent after realizing it wasn't a big deal and literally nothing changed.

EDIT: Think of it this way: there's nothing preventing that type of behavior right now. What's stopping 3 Lala spellcasters from donning identical robes, getting all the stats they need from their non-displayed gear, and playing a nasty game of "hide the healer"? Notice that's not happening: because it doesn't work. Human beings just aren't stupid enough to fall for such a ruse long enough to make a difference.