I agree that the fundamental bias of the spec is the scaling being worse than the other two. --Althought it does not answer to rof nerf and dps loss, short term concern--
Why not put a passive talent which let us regen emberbit in combat based on haste ? the more haste you have, the more regen you have, it could be used to compensate the rof nerf too?
--not that difficult to balance, interesting to TC and in this case, meta and things related to haste which is the downside of the spec bring some interesting buff