Correct me if I'm wrong but I think most good healers enjoy the multitasking element of healing more than they do the actual healing aspect of it. As it stands increasing damage is a bit of a band-aid solution to the current level of boredom people are facing when they play the role.

Instead of just slapping high damage onto things they should make healing as a role more busy and intense, making mp and resource management harder as well as creating a dps rotation that demands more attention than what we're currently stuck with.

Healing should be the busiest role, but instead it's the one that occupies the least of your attention because mp management is easy, healing is easy, and dps is easy.