1) Pvp gear should have some type of progression. So maybe a cool idea would be for the elite pvp gear to have a metric ton of sockets! It would make it better than PvE gear then.
2) Fix the tank spec issue in a simple manner that would be awesome (imo) for tanks. Allow vengeance back in pvp but cap it severely low. Then let pvp power increase the amount of vengeance a tank can gather. That would make pvp power a great stat for tanks.