So far I only heard people complain that the new content is too brutal to healers; especially Nidhogg NM and Weeping City require "so much healing".
Personally, I found it to be a nice amount that finally forced me to heal more on the level of how much I had to heal in Alex Savage, while still not stopping me from supporting and attacking.

Also, healers meld accuracy mainly BECAUSE of raiding, since content outside of it can be done just fine with base accuracy.
Why are healers dpsing in raids? Because the combined dmg from DPS and tanks is not enough, and usually NOT because they don't have to heal.