You could cull half the healing kits just by making the remaining cooldowns shorter and adding more stacking resources, yeah. I just leveled AST to 90 a while ago, and it's... why. Who thought it needed another single target mitigation ability? It's already in the kit, I don't want to make space for this on my bars again. And really the rest of the abilities are exactly like that too. How many healing buff skills do I actually need? Or medium party heals for that matter. You just basically use whatever is off cooldown anyway, and I just don't believe finding the button that's not darkened actually adds any real complexity. The only challenge that comes from that is when you start playing a job and haven't memorized what each ability does yet, which is another reason why healers become boring as competency increases.