So wait hang on a second....
We have 2 casual fights for mr casual Timmy:
Fight A) Timmy is maintaining 3 dots. Timmy fails. He gets some grey logs. The boss takes a few seconds longer to die. Nobody cares.
Fight B) Timmy has to maintain Medica II uptime (aka 4 times a minute) as well as some single target healing ala Cure 2 or Regen. Timmy fails to do it. People die. The boss takes significantly longer to die and everyone's angry.
Do you not see how awful your example is? Are you seriously trying to tell me that example B is better for a casual player that's going to struggle to press ~6 buttons a minute than option A? Or are you trying to suggest that there's a way to make us have to press medica II 4 times without the damage killing us when we don't?
I legitimately mean it. You keep saying repeatedly that it's a bad thing if this casual player has the potential to fail at dealing damage, yet that's exactly what we have now and you almost never see people complaining about it until it gets to extremes which have such lenient DPS checks that Healer DPS still isn't a requirement whatsoever unless the rest of the group is pretty damn bad. Why is a non issue suddenly going to become a problem? Are you assuming that SE are going to suddenly allow parser toxicity in random content with this? Are you assuming that they will add in enrages to casual content along side revamped healer dps kits? What angle are you coming from here as I just can't get my head round it, sorry.
To clarify I do think that throwing more damage out in mainstream fights would be a good thing for sure, but enough that we genuinely need to maintain Medica II uptime round the clock or assumedly someone dies?
Do you genuinely feel that that's going to be less problematic than more dps complexity?