It seems I wasn't clear enough in my previous post and it got misinterpreted, I apologise, let me be clearer this time.

I wasn't talking about solohealing content, what I meant was that current savages and extremes can and have been cleared in a standard party comp of 2/2/4 with one of the healers outputting little to no damage and just spending most of their time on their healing duties, this would mean that even cutting the damage output of the current filler spam playstyle by half in order to make room for more complexity would mean that all content can still be cleared with the filler spam playstyle aside from early week clears of savage and ultimate content. This makes the argument that "adding complexity makes healers that are used to the current playstyle no longer able to complete content" a false one.

What this could mean is that people arguing so fiercely against any form of complexity would want to play optimally with minimal effort. This is just my observation, feel free to disagree.