In order to fix healers, the devs need to ditch this pure healer mindset as it flat out doesn't work. They tried it in SB with WHM and the job was abandoned in droves. They've doubled down on it again this expansion and healers have been making threads like this since shb launch. Yet STILL the devs don't listen.

Healers need to be developed along their previous lines, but have their flaws from previous expansions fixed.

Sch having lots of dots and debuffs, a pet that assists their healing. Not this clunky mess thats glitching out constantly
Whm having proc based or buffing based high potency attacks using the elements. Direct and powerful, but fun
Ast having varied buffs and the ability to extend the duration. They could also allow dot extensions too to put more emphasis on the time portion of their identity that was stripped

This is what healers want as a minimum going forward. Ask around and you won't find a healer whose opposed to having to heal more

Having a fun downtime doing dps and having plenty to heal are not mutually exclusive