Personally I think this is something that they should've done long ago - say, at the game's inception. But right now, years after they made tank's sustenance broken and nonhealer HPS to such a degree? It's hard to not think of this is their way to give even more power to non healers/SMN/RDM. Especially when they've mentioned it will have 6m cooldown and stackable to 999pcs from vendors; why then, not make them a Duty Action? Saves item slot and the "sorry I don't know the change/I do not buy them"-excuses that will surely come up one way or another.

It's an inoffensive "should've done this long ago but better than never I guess?"-change at best.