I think this is the biggest problem. They don't understand how the playerbase interacts with healers because they don't listen and stick to their own healer fantasy while designing the game itself for something entirely different and then do a surprised pikachu face when the players don't play how they wanted them to play.
Even if they don't have a dedicated healer designer (which they desperately need), it wouldn't be as bad if they would just listen and accept the feedback of knowledgable healer mains instead of brushing it off and twisting their words. But they don't and so everything they did achieved the exact opposite of what they set out to do.
Increase healer population by making it accessible - and they dumbed it down so much that they drove off more healers than they got. Queue times for healers have never been this consistently low as they are since early ShB.
Reduce pressure on new healers to multitask by reducing dps kit complexity - and they dumbed down healing requirements and dps kit complexity so much that now everyone expects healers to dps and with good reason because it's literally one button.
There was far less pressure to dps on healer when we still had multiple dots and Cleric Stance because people knew and understood that it's not as risk-free as it is now.