Just some background, I am currently ranked 146th in the world for Damage as a MW Monk and somewhere in the 1500 in HPS. So I have some credentials to speak on this topic.
Unlike other healers, we rely on the frost set and this does anywhere from 30-50% of my damage typically. The unholy set is usually a 15-20% overall boost in damage, maybe less for healing. As it stands, we are actually the lowest DPS Healer in the game when looking at Guardian Logs:
H Pally: 8.8k
R Shaman: 7k
R druid: 5.9k
H Priest: 5.5k
D Priest: 5.4k
Sure we do insane HPS but when did HPS actually matter? Sure when you’re pushing the race to world first, but then you want good DRs which we lack. Our 2 & 4 pieces set bonus gives us more of something that frankly we don’t need. We don’t need more raw HPS, we are already way ahead of everyone else. What we need is either more damage or a DR at the least.
So we will need direct buffs to our damaging abilities and something that works better with our kit. A stationary 4 piece for a mobile healer seems awful.