I dont mind a nerf but the only reason i Rolled human priest is because it seemed like the weakest form of priest and I wanted to play the weak to beat the op/strong such as undead.
If you dont have healers you should heal instead of using shadowform.
if youre in shadowform and there are other healers, you wont be the first target at least.
and its not bad in av when you need to dps the elites there.
I usually farm Frostmaul Eko when theres a group up and Solo that dwarf boss from Uldaman for shards.
you can try to solo rotgrip and the princess in maraudon as well.