Interesting and mildly relevant topic point:
Healing Coop Azhdaha in Genshin with characters like Kokomi was an absolute blast. As soon as I got the likes of Furina the fun was gone.
Why? Even though I could still heal plenty enough on Kokomi, positioning and mobility was supremely challenging, if I dropped my Jellyfish in a bad spot I wouldn't be able to move it for a good long time leaving a gap in healing long enough that anyone eating the dot would likely die, so I had to plan and adjust on the fly around unpredictable teammates. The fight put me under pressure and made me pay attention.
Meanwhile Furina is a lot like a current day XIV healer in that she effectively has no real limit (At least not that can be tested by the majority of content assuming a vaguely competent level of play) nor restrictions to her healing. She can flip the switch to heal at anytime and she can reposition and refocus the healing at anytime. Even though her actual healing output isn't actually any higher than my Kokomi, she completely nullified the pressure the fight put me under.
Whilst yes, the healing requirements in modern day content are a problem, it's not the only problem, not by far.