Well, right now I have been in a PRX pvp group as a healer for over an hour. Now granted, this is my first time pvping in a group in this game, so take the rest of what I say with a grain of salt.
This feels to me like the worst experience as a healer in group pvp ever. I have healed in EQ, WAR, GW2, DAOC, WoW and other games. All of those games had a superior healing experience than TESO. My group starts taking damage, so all I can do is spam my smart heals. Zero skill involved. That isn't even the worst part. The worst part to me is I have no idea who I'm healing or even if I'm healing is mattering. I don't see my hots popping on people, I don't see my heals moving people's health bars. I have never, in ANY of the games before as a healer, felt so disconnected from what I was doing.
I loved pretty much every minute of pvping with PRX in GW2. I can't believe how little fun I have had today though. My only hope is to reroll damage and maybe try that. Did other healers have a better experience than me? Maybe this is all just me being inexperienced at the pvp in this game or something, i dunno.