I did the vanilla honor grind as a holy priest and loved it. People are generally very appreciative of healers in pvp. Like you said, there is an abundance of dpsers. Healers are able to make a huge impact in bgs because nobody there wants to heal.

I dont know what kind of dps priests do at 85. You forgot to mention they have fear ward. I cant remember the cooldown but it cant be more than 3 minutes. Your leader could be unfearable with that on round robin. I think you also forgot binding heal. With A targeting B targeting C, etc thats a very fast heal. Its better than penance with no CD. Also, priests have so many aoe heals you would be unkillable except by a coordinated team using vent. Theyd have to cc your entire team. I think in bgs, aoe heals outweigh a dispellable bubble. Theyre also less situational. Can they dps like a shockadin? No, but they sure can heal and thats whatbyou want to do. And if you want to cap objectives, nobody can stop you. You can kill a few people with priests but your obvious strength will be healing.

I think of it this way: is a bubble going to save me from a situation where 5 of the best healing class in the game cant keep me alive? Probably not.

If you cant tell, i like priests.