Ugh, I hate videos.

The oldest text-based resource I found is from 18th June 2017—in other words, two days before Stormblood released, so it's updated for Stormblood, not Heavensward. But it does have the StB changes listed, so you can sort of figure out what it was like in Heavensward:

http://web.archive.org/web/201706182...bguide/scholar

Based on this, the HW version doesn't honestly strike me as much more mitigation-based than StB/ShB scholar. So if that's what people mean by a mitigation-based healer, I imagine I'd be fine.