Dual Wield Inherit Block Chance and Dual Wield Mastery

My suggestion.

There is a mastery that gives you +20% chance to block spell damage while dual wielding. Dual wielding does not inheritly grant chance to block attack damage.

Change mastery to dual wielding no long grants inherit bonus to block attack damage, instead gives inherit bonus to block spell damage.

I agree with this opinion. While the Dual-Wield Mastery in question does not explicitly say that the Spell Block provided is an inherent bonus, it leads the reader to believe it is. Furthermore, by it should be. Here's why:

As it stands, there is no reason to take this Mastery on any Dual-Wielder - ever. It is simply far more effective to take Versatile Combatant and stack your Attack Block as high as possible. This is even more apparent on the Gladiator, which doubles its inherent bonuses from Dual-Wielding.

If this Mastery was changed, it would result in a situation in which Gladiators in particular have a good reason to not take Versatile Combatant. Instead, you create an immediately-different potential build path, where instead of taking Versatile Combatant the Gladiator takes this specific Dual-Wield Mastery to gain a total of 40% Spell Block, and then needs to spec further into both Attack and Spell Block rather than just the former.

By doing so you render Versatile Combatant as no longer the de-facto choice for a Dual-Wield Gladiator, and give players a little bit more agency. This also renders items that provide Spell Block in specific as more of a choice than they currently are, where they are effectively second-class citizens to items providing Attack Block (which yields twice the value on a Versatile combatant Gladiator).