Mistweaver was kinda unique back in MoP and WoD, that's why it became my favorite healing spec. Unfortunately in Legion they streamlined them all. In Shadowlands all of the healers got an identity again, but they forgot that for Mistweavers, which are just a mix of Druid and Shaman.
I'm still very convinced that Blizzard is going to reuse the Azerite effects sooner or later. With essences etc. we had an entire class toolkit of amazing looking animations in the game they just got rid of.