I’ve been reviewing the Two-Weapon Fighting information, and I don’t understand why Dual Wielder doesn’t grant a benefit like the Two-Weapon Fighting fighting style does.
The description of the feat says “you have mastery over fighting with two weapons”, which implies that you would have already benefited from the two-weapon fighting style considering you’ve “mastered fighting with two weapons”.
According to this thread “Is the Polearm Master Feat compatible with the Two-Weapon Fighting style?”, a feat like Polearm Master basically adds the ability modifier to the offhand attack’s damage inherently. Aside from limiting the damage of the offhand attack to a d4 of damage, I don’t see why a whole feat like Dual Wielder wouldn’t offer the same. Of course, I could be overlooking something that makes adding the benefit of the fighting style to the feat problematic.
What are the mechanical consequences of adding the Two-Weapon Fighting fighting style’s benefit as an additional benefit of the Dual Wielder feat?