I don't think it's made healing hugely difficult or anything, but I will say that the stats squish seems to have made certain level ranges hit a lot harder. There are big pulls in a couple of dungeons that you could basically snooze through before the stat squish where now you actually need to, y'know, actively heal periodically. Not just "put Regen on the tank, drop Asylum, and spam Holy for 28 seconds."

(Similarly, when playing tank, I've noticed a few places where dungeons hit harder comparatively. Qitana Ravel is a good example; the big pull between the first two guardians in the first section is still perfectly doable, but it definitely feels a little spicier than it used to.)

It's not difficult in my experience, nor has every level range been affected. But it does feel like a bit more healing than before in certain scenarios, yeah.

Honestly, it's a change I really appreciate, as a healer main. Not that I mind being green DPS, but I do main a healer because I want to heal things; please give me more things to heal.