DPS issues aside -
5% is still quite strong. Currently the only DPS who can reduce damage taken are MNK's Dragon Kick and MCH, so 5% mitigation for free is still quite nice IMO, especially because the other class in the role, BRD, gets no such mitigation. I could see that having been very useful in FCoB in progression on virtually every turn, and if MCH gets a little DPS love I could see it being useful in any future raid.
