It definitely needs the damage reduction reduced but that's the only thing that should happen. I use HoS in the raid now because it's amazing for rapidly clearing adds, especially at Golgoroth & Daughters. Also great for killing the Vessel of Oryx. Anything more than a nerf to damage reduction would absolutely wreck this subclass. It's always going to be a top tier super unless they completely overhaul it, which I highly doubt anyone at Bungie wants to do.