I mean I just don't see the point in them. They dont really add to gameplay and is just a crutch for pvp blood presence unholy, and the rare chance you have to OT something in pve, (none this tier).
My suggestion?
Why not just baked the effects of each presence into the respective specs and replace presences with auras. Auras are just toggled group buffs you can change to meet the group compositions/personal needs (unholy aura=haste frost aura= mastery blood aura=stamina buff)