Stat differences affect how much I heal, which comes between 111121111 gameplay, but do not alter 111121111 gameplay.
Half solution and honestly people are used to getting gear to crush content when going through MSQ and it's very RPG progression and should probably just be allowed in at least MSQ dungeons. I think it's good that the average player can get an edge with gear and we constantly reinforce that they shouldn't have, seemingly, any barriers to completing MSQ content.
There are other variables you can touch to change how much I heal and what my core damage rotation looks like. I would like to look at those.
But looking at ilvl and gear for other content that healers might want to do isn't a bad idea because people who want to heal more should also be accommodated. I just don't want to fall asleep in ARR dungeons.
Also level sync needs to be overhauled finally and the game should be balanced around it.