Healers are pretty pissed and or demoralized because self sustain of tanks and their ability to heal the raid is so broken that I lack the words for it.

Self sustain in general needs to be dialed back to make healers needed.

Healing also needs to be more interesting as healing requirements are so low that we have to dps out of boredom. You know, have healers actually need to heal a majority of time.

Devs should consider looking at other games perhaps to better understand how to make healing more interesting and not falling back on dps all the time.