It was not fine in 50 content, outside of the first 2 dungeons. By the later tiers of 50 dungeons it was already useless, well before heavensward.
A single spell is a pain to balance. It affects more than just itself. It's good to keep it that way because it means skills have degrees of usefulness. If it were easy to just throw an extra spell in the mix then that means all the other spells weren't well balanced.
First of all, all you did was contribute to overhealing. Second of all, you gave me crap like 2 or 3 posts back for comparing stuff in savage and fcob. 3rd of all, as you said, those situations shouldn't happen in the first place so why tf should we be balancing jobs around them?