I still do not understand why people hate shirk.

Unless DPS get access to provoke, they can't use it to the full potential Tanks can. Giving a tool that's best used for tankswapping to classes that already have their own equivalent (IE Diversion/Refresh&Tactician) seems wasteful to me.

Also, the reason something so critical for healing (Esuna) became a role skill is because there's absolutely no reason for there to be unique skill for each class in a role, when all the skills will just do the exact same thing. Just like Provoke and Rampart.