Secondly, change the "Divine Purpose" talent so instead of all our dps abilities having a CHANCE to generate holy power, make it a few key abilities garentee a holy power charge (maybe Divine Storm and Judgement?).
A few small changes could really improve ret dps and make the spec actually useful for more than just leveling. Heck, just removing the shared CD on DS and allowing DS to generate holy power would improve dps noticably. Why can't it be done?