I've done a little raiding as a holy priest, and I enjoyed it. I particularly enjoyed the mechanics of dodging the 5SR; employing cooldowns, procs, knowledge of the fight and just gut intuition to avoid casting as long as possible for maximum regen, but I stopped raiding in wrath long before ilvl creep took hold and healing became a throughput race.
Spirit's now everyone's regen stat, but the 5SR is gone, and the state of wrath healing is mostly unchanged. It's impossible to see yet if the early stated intention of a return to tBC era healing--mana management, downranking, strategic choice--has panned out.
If the rush of twitch healing is gone, what takes its place? What reason is there to show up to the same fights, week after week?
I've yet to see the most important question explored fully, so here it is again:
If you've raided, or just done a lot of heroics at level 85, is it enjoyable?