The healing nerf, while required has been done with a sledgehammer not a scalpel as was really required.
Yes healing was overtuned since day 1 and they’ve been slowly chipping away at it and it has been getting better. The theory behind making healers squishier is decent but it also unfortunately gatekeeps a lot of the abilities that require you to be static to cast - sacred ground, lights embrace and divine embrace.
On top of that from my limited testing (no real scientific method just seeing what my self ticks are doing in healing with duels), it appears they’ve also tinkered with the way intensify, dodge heal buff and buff heal buff applies on the heal. Whereas i could previously stack a sacred ground to around 1800 per tick using 3 stack intensify, dodge heal, buff heal buff and rally, now the most i can get is 750. I suspect that like the light armour 30% applies to base weapon damage heal before focus buff, these buffs have been adjust to do the same.
Overall I’m seeing about 40% of my previous HoTs on heavy armour. When i went to medium armour it climbed about another 5% flat across the board, regardless of buff stacks etc, so would take me to about 45% of my previous total despite being a lot squishier.
It also appears that revitalising beacon got adjusted so now it only applies on new HoTs you go into, whereas previously you could proc it and then your self-healing would automatically increase. Minor change but still a change that i didn’t see noted in any patch notes. It was pretty OP tbh, would push sacred ground to 2300 /s and beacon to around 1300/s self healing only.
Interestingly Lights Embrace seems to not have dropped off anywhere near as much as the HoTs have, but there was some previously inconsistency with buff numbers and what counts towards that increase so there may have been back end tweaks to that. Bearing in mind they have one of the worst single target healing systems I’ve seen makes it pretty unenjoyable to try and use.
I switched to melee for an OPR and by keeping an eye on my heals ticks noticed that GA crit heals and warhammer cc procs where just about healing me for more than the healers HoTs, so that’s a great state of play.
Yes just to beat all the gotcha’s there I went from one monkey brain profession to another because it had a simple swap around constitution to keep the sameish gear 
EDIT: all of this was based around 330 focus/100 con with a 574 laz LS, infinity gem for divine and a 501 ring for sacred.