I run in Draconic (25), Exalted Angel (39), and Primal (7) and don't really notice much of a difference in Epics and Reaper.
Just from using spells and eyeballing damage, certain spells in my off rotation are down 20-25% but most of my damage is Divine Wrath, Energy Burst, and insta-death.
I was a bit worried going into this update, but it's not really that bad in epics and certainly not enough to force a new build or reroll.
Hopefully, heroic level FvS are more in line with what the devs wanted but it's unlikely I'll play one in hardcore anymore, even with having done several seasons with one.