My opinion has mostly been, "If healers can do 90% of their healing with well-managed oGCDs while providing damage - it is probably a reasonable balance."

Healers with less experience probably would need to expend more GCDs on healing and less on damage, but that's the benefit of learning how to play the job better. And of course, some healers can rely solely on oGCDs. But it is a bit disconcerting if healers can be removed entirely.