But that brings us to the usual problem, even if they made proper healing-intensive fights they will still be 100% limited to just savage, ultimate and maybe the odd extreme. So in the majority of content, expert roulette, alliance raid, normal raid, treasure maps, etc you will still be bored to death.
Not to mention that if you take a good hard look at healer's healing kits they're not very interesting either, outside of very few exceptions like Haima, Liturgy and Macrocosmos. So you've replaced spamming Glare with spamming Medica, the most bland "make HP bar go up" spell ever, GG.