Agreed. Not totally necessary, but is something that I think can only be beneficial. And I've mained Healer since September and recently picked up BLM, both situations can happen quite easily during HM primals (haven't touched EX, not sure if I'm looking forward to doing so.)

Oh, and I remembered the reason for changing mob AoE colors was to improve playability for colorblind players; so perhaps the healing ring could be a blue color instead of green.