How you look and move in PvP is sometimes more important than just for cosmetic vanity, which is why Guild Wars 2 is planning to add "model standardization" as an option with the September feature pack.
In today's dev diary, ArenaNet explains that since all of the races and classes have different animations for the same skills, it might be difficult for competitive players to identify what's coming at them. By being able to replace all enemy characters with standardized human models, PvPers will be able to clearly identify the class, weapon, and skill animations being used.
The team's also finishing up work on two new sets of PvP-exclusive armor that draws inspiration from Guild Wars 1's Hall of Heroes. Players can earn one of those sets of armor by progressing with the new PvP reward track that's also slated for the feature pack update.