I have reached a point where I have just about exhausted all my arguments pertaining to this subject. I've tried to see the devs side of things, and I've tried to see the player's side of things. Trying to add any kind of rhyme or reason to their decisions such as: ED got nerfed, but Broil got an increase, and you are casting that far more often. Or to be happy that Energy Drain causes any damage at all, places me in the realm of the unreasonable.
The devs cannot be more clear about where they want their healers. They are not fans of the mentality that optimizes Energy Drain. I believe that hoping the devs will flip the switch on this thing is lost energy. They are basically double, perhaps even triple downing on their philosophy of the pure healer and the Holy Trinity. Don't kill the messenger. This is my observation; not how I feel. How I do feel is that we either have to ship in or ship out, and I don't contest either decision.
I have at least one job in each role at max level, and feel like each role is clearly identified in their responsibility in the group, with very little overlap. The overlap is necessary though so we can solo, and the devs try to limit the use of this kind of play in a group. When I say, "overlap" think of things like how DPS is more fun when the mob's attention isn't on you; or as a tank even though you can hurt the mob and it can't kill you, you still kind of wish a BLM or someone else was around to kill this damn thing just a little faster, and you definitely want a healer if you bit off more than you can chew. And as healer you kind of don't want to solo anything. Doing so literally eliminates 90% of your kit. The game does well to disguise just how much it encourages group play as a lot of players feel it is very solo despite the massive amount of time they spend in groups.
That is a little out of scope, but in short, the devs have healers and the other roles right where they want them. Not the other way around.