I just had a though about disc. Currently they use bulk heals and absorbs usually resulting is heal snipe. What if the niche of HoTs was made the broad feature of Priests and rather make Holy into a Large Heal / HoT spec.
Would make it less annoying given that with heals and the time given by a bubble before you pop it a heal can be lain down but if it were say a HoT it would make it less a crunch moment to pop it.