Side note, I wouldn't blame y.p too much on the healing, he plays a BLM and doesn't seem to be a master healer. He can't be a pro at everything especially considering the average player must have more free time in a week than he has in a month.

To me the fight designer are more to blame. It's specifically their job to design fight and be sure all 3 roles are invested.

If after so many tiers they keep being told "there is nothing to heal" then perhaps they need to have a new approach.
I do think this tier was better and not just more raid burster requesting over the top mitigation