Wait, sorry I am still new to FF14, is not anything above a normal raid(like savage) progression raiding? I had thought it was. But yeah like I have said in my post, if the encounter is passed then nothing else matters...unless it was explicitly stated that it had to be done in so and so time. If it wasn't then that is just someone moving the goalpost.
If the healer not doing dps causes a group to fall to enrage then yes, it is a problem. Or it could be the dps doing a lackluster job, who knows. I am under the impression a healer SHOULD be doing "ABC" but would not hound someone who does not subscribe to that ideology...until we start failing encounters.