It would be cool to get some new upgrade paths for the Slayer PvP gear, maybe with upgrade parts that you can purchase with Challenger's Marks + PvP-related active upgrade system targets. The stat increases shouldn't be too big, just a slight bonus (i. e. 3-5% stronger than Slayer), epic quality and maybe some cool new wardrobe appearance on them. Something new to work on for PvPers.