When I hear "healers disagree, there are NO solutions that would work" I get this image of chicken little in my head- 'the sky is falling !!! the sky is falling!!".

I just find that unrealistic. It's just the normal course of business to have to deal with multiple and sometime diverging opinions and /or priorities for features and no matter what you do, you will not make everyone happy. What you try to do is think about a design that achieves some goals, you communicate them, and listen to whomever your target segment(s) is/are - in this case healers but also anyone else affected by those changes - likely DPS and tanks. If your design gets positive feedback - great- if not- you may well need to adjust.

This is how I would hope the dev team works, and I may be wildly unrealistic.