I talked to some of our PvP Devs. Unfortunately, we are still deep in the development process and we don't want to release any details till things are more "final." As soon as we have any updates, we will be sure to post them. Sorry I couldn't give you any concrete details, but keep checking back!
Deep in development? It's been almost a year since you released the start of this.
See, this is yet one more example of how BW rushes out their content unfinished, untested and without any forethought beyond what new flashy worthless crap they can throw into their cash shop.