Allow me to explain why I don't like this system by using the past games as reference:
Dark Souls 1: Heavy armor made trading blows viable with any weapon. Lighter armor made being agile and/or using bigger weapons more viable. Pretty much any combination of weapon/armor worked so long as it was built smartly.
Dark Souls 2: Same concept. Heavier armor allowed better damage trade while bigger weapons allowed an overruling of big armor. The guard-break system prevented people from hiding behind big shields.
Dark souls 3: Doesn't matter what physical build you have, you're still gonna lose to the guy with the biggest weapon/armor because they only need to hit you once to get two guaranteed hits on you. And good luck trying to get quick damage off them.