I don't understand why there's so much aversion to utilizing nerfs in job balance in this game specifically. Every other game dev does it without issue. You recognize PCT is overpowered, but you'd sooner have all other jobs to be reworked just to accommodate it. Just fix the problem directly.

With the release of 7.0, however, we noticed that the DPS of the new job Pictomancer clearly stood out from the other classes. We could have nerfed Pictomancer before the raid, but since many people liked playing it so much, we decided to bring the DPS of the other classes into line with that of Pictomancer. Source
It's so tiring seeing the dev team predictably try to fix recurring problems like this with half-hearted upward flat potency buffs to all other jobs.

Either they'll do this incredibly slowly all expansion and PCT will perpetually dominate to the point that they start losing players, or they'll overcompensate in response to player outrage during FRU and PCT will be left underpowered for the next tier. This is all completely avoidable, as direct fix to the problem job in question is all that is required.