Claiming that spriests are the lowest hybrid dps class when the difference in most dps is only about 3,000 at most isn't really saying much. Spriests are in a good place right now in pve and don't really need anything else buffed other than their aoe damage.
I also don't get how you have to manage your mana at all but I won't judge on that since I'm primarily holy for my raids and only go shadow for a few fights. Though when I do I'm in mostly healing gear and I rarely go below 70% of my mana.