As much as I would like to see parry become useful, I still wonder if it'll be more considered if it still has the fundamental problem of essentially being a dead stat as soon as you Off-tank.

The general argument for the value of other stats is more DPS = Less time fighting = less damage done to tank/raid as a result. It's clear that the concept of MT and OT is very dependent on the fight and as seen with current tiers of raids, both tanks will have equal opportunities at tanking. But if both tanks ran parry, then they're not going to be as good as if they both ran DPS stats, because DPS affects the performance in both situations, whereas Parry is dependent on being hit to even work on top of the hit having to also be PHYSICAL.

Parry also sits as a defensive stat. Meaning it has that potential where if you make it so good it's required to survive something, all you really did was streamlined tanking to stacking parry and essentially remove the pursuit of options altogether.

Additionally, overall damage mitigation from parry versus faster clear time doesn't account for the concept of an Enrage timer, and Parry cannot do anything about the 9999999999 Pure damage. In cutting edge where enrage timers are hugely relevant you will want every bit of DPS stat because it won't matter if your Parry helped you shave off 10-20% encounter damage when you flat out just die at the end.