I think that doesn't work because WoW hasn't really focused onto organized group content that much, there's not communication required at its core since forever unless you're pushing PvP / PvE really hard.
On top of that, we saw hints of that in WoD with the Legendary ring, after the first use, it very often turned into argument when to use the 2nd one, use it on CD, delay it for CD's for spec X,Y and so forth.
It really didn't feel that amazing, it was a tool for the raid leader to play around and that's it.
There's room for some support tools, but i stand by it that basically shoving it into a handful of specs and turning those into the anchor abilities wouldn't be great.