In my thread on suggested changes to Base Weapons I suggest the implementation of a “Parry” effect, that is more like the Dodge effect than the Block effect. Since parrying with a weapon is decidedly inferior to blocking with a shield from a defensive perspective (though better in not interrupting your attack).
I think that would be a better way of approaching this issue than giving Frenzy Barbs Weapon Block on top of everything else they have going for them.