Unfortunately, Imma need to answer your questions with a question. The same one of posed in those previous topics. You probably still wont agree with me, but hopefully I can shine some light on why I take the stance that I do.
"At what point would PLD step too far into the healer role? Where is that line?"
There is only a finite amount of healing to do and we play a game in which healers dps solely because the alternative is being idle. There simply isnt enough to heal to keep healers busy.
So how many healer actions should PLD be able to take from healers before it crosses the line?
A small handful of medicas / media IIs?
A few cures?
For the ppl on the "Clemency should be insta-cast" train:
The majority of the clutch heals?
To address your side topic about brez:
Brez is its own can of worms and my personal opinion about PLD not having brez is completely separate from the role issue described above. Keeping brez with the squishy classes means your group cannot recover if poorly handled mechanics result in party wide damage high enough to one-shot squishy classes. In other words, it helps ensure squishy classes have an opportunity to survive group-based mechanics based on group performance, rather than their classes armor/vit cap.