Good lord. Stop making things extreme. Seriously. "Omg just delete xx job!" Do you even hear yourself? It's just an invuln skill. Its already a niche skill being an ability exclusive to tanks. Much like Esuna for a on demand cleanse. Healers cried when this was made a role skill too. And guess what? The game is still doing fine. More than fine actually. So all evidence to the contrary about how bad and wrong such decisions have turned out.

Get over it. I really mean that.