Ellesmêre, the #1 Hpal IIRC, ran Mistweaver in M+.
On stream has said that Belf Racials are better in live keys then Nelf Racials.
Especially this season with the Awakended Affix has significantly reduced the value of Shadowmeld cause of obelisks and the only reason why they still use Nelf in MDI is because its more time efficient to skip all 4 obelisks and just kill them on boss then it is to kill them separately which you can’t realistically do on 25’s because of the amount of damage they do.
But he’s clearly doing it wrong and being one of the best healers out there currently because they don’t copy what they do in the MDI on keys 4-5 levels higher. How stupid of him.