It's a simple idea. Block rate/strength comes in a set amount based on shield type and item level. What if Parry worked the same way as a flat amount on tank weapons based on, in this case, only item level?

Parry as a stat has been especially lackluster in HW. It's hard to rely on Parry rating to increase your longevity in fights because it's up to RNG whether or not you parry. While DRK and WAR both have CDs for increased parry chance, it's still just a chance.

The changes to Vit aimed at getting Slaying gear off of the tanks did a little bit to change the "avoid parry" meta, but the fact remains that less parry and more of any other stat is still better. So what if parry was removed as a secondary stat and implemented as a flat rate on tanking weapons?