If this is talking about the all dps clear of Copied Factory, here have been all tank and all healer clears of it previously. The same is true of the Heavensward and Stormblood Alliances when they were current. Casual content is not a good metric of anything really.

It's more an overall design philosophy disconnect with the devs. What's hilarious is even when they said healing would be more intensive (this was just before ShB launched) it actually became even lighter. Personally, I think its because they design everything on a casual level first and then bump everything up maybe 70% for Savage content.