Well, the most obvious thing is to have similar gears level 120-130 via PvP. Right now, it's mostly for vanity. The gear has to be an attractive options. I understand that they do not want to make PvP a priority, so that you absolutely have to have the gears if you want to get best in slots. Right now, the reward is not exactly screaming "worth your time, please do it!!. And yeah the GC affiliation has to go out, just put everyone in the same group/alliance random regardless of what your GC allegiance is.