Unfortunately the direction they have very obviously chosen is the direction with no complexity or depth at all. The main defining pillar of healer design in ShB and EW is a skill ceiling that is reached at level 4.
You know how Super Mario Galaxy technically has a "2 player" mode, but all player 2 does is aim at the screen to pick up and shoot star bits? That's what the job designers want the healer role to be. They want it to be the role you give to the absolute worst player in your particular group so they can feel technically included without actually doing anything. At this point we're about as close as you can get to a child being handed an unplugged controller so they can pretend they're playing the game with their parent without knowing any better. Every tank buster cast bar is the parent pointing at the screen saying "See that boss we just beat? You did that!" A token gesture to try to fool us into thinking we're participating in the same game that everyone else is.
Healers unironically feel like more of a "limited job" than Blue Mage does at this point, and it's intentional.