The elephant in the room is Earthly Star. In fights where AoE healing is only required at most once every minute, Earthly Star basically trivializes any AoE raid damage. In Deltascape, Sigmascape, and Alphascape, Earthly Star is just too strong and makes Cure III so weak in comparison. Indom was likely buffed to 500 potency mainly because of how overpowered Earthly Star was in 4.0. Earthly Star is probably the reason why SCH can safely use Energy Drain and ignore Indom. The only fight where Earthly Star is weak in is UCoB since major AoE healing occurs more than once a minute. Earthly generates zero enmity for AST as well.

oGCD burst heals have become way too strong to the point that formerly cure-bomb heal, Cure III feel weak. If you make any healer able to heal any content, then it invalidates any healing advantage another healer has over another job. DPS utility becomes the only optimal solution and I frankly find that uninteresting for healing jobs.