Originally Posted by
soshifood
It's very useful for the Overcure trait. I'm not sure if you guys noticed, but when you have Overcure, it's a guaranteed critical hit. This makes Cure III arguably more reliable than Cure II if you need to heal a tank fast. That being said, in more organised parties, you can have party members deliberately run towards someone, in which the WHM will use Cure III for a more potent aoe heal than Medica/Medica II can be. This, along with the faster cast rate grants the skill some merits.
I believe that it's working as intended.