WoW! Now Priest turn 2 hero power and emote is a really powerful play. you will be healing your hero on t2 because of Pirate Warriors, Token Druid, Murloc Paladin, Secret mage and maybe bubble Paladin and Secret Hunter in the upcoming meta.
It's actually pretty decent. It lets healing classes maintain some tempo when they need to stop and heal for a turn. It has potential in more than just Priest, most notably Handbuff Paladin (or Paladin in general).