I feel like I wouldn't care so much about my 2-3 buttons for DPSing as a healer if the healing was more engaging... That said, I'm not entirely sure how this could be made so without some big changes. One idea I had floating about was of different kinds of healing damage which would necessitate different kinds of skills. In real life, there are instances where different protocols or algorithms are followed depending on how a patient presents. Here's a simple example for a patient presentation with a possible acute coronary syndrome:
Now before you roast me alive, I know the comparison is not perfect. In-game, I find it unlikely that you'd be triaging someone for a possible myocardial infarction
in the middle of combat but the algorithm serves to illustrate the kind of decision-making that often goes into... well, medicine. I am also not saying that the nuances of real-life medical care should somehow find their way into FFXIV, but I'd be lying if I said I wasn't yearning for a bit more complexity. As others have pointed out, it feels like you're just making bars up when they go down and I find that much too reductionistic to be engaging. There is some modicum of complexity to be had right now since you also gotta know
when damage is dished out... but that's more of an encounter design consideration rather than the healing
itself.