Outside of enjoying MW playstyles there is absolutely no reason to play it. Its worse in all regards to other healers, sans disc priest in raid but they are the only class with two heal specs. The recent talent changes are nothing more than putting lipstick on a pig. MW is simply functionally broken. The amount of setup required to do most things with the class offers little reward compared to say setup on a druid. Not to mention, a druid get its setup faster than a mw.
Pushing 1700+ io i was struggling as MW but swapped Rdruid and was pushing +10s in 360 gear with a 342 tank on the the third day. MW simply isnt designed to handle the M+ content we have.