I want to point out that the all tank run of UCoB was only doable in ShB because GNB can output DPS-level damage at lv70. The no tank run of also UCoB was done in EW. The only all healer run I managed to find was a 24 healer run of Ridorana Lighthouse.

Notice how none of the runs where you drop the tank or DPS role was done in ultimate content on the same patch it released. Seems to only be happening to the healer role, funny that.