It is clear that you have misunderstood general idea in this article.

This is like going on CS:GO and asking why there's no Medic and Spy classes.

It's not chivalry, you're not needing to do anything more than drag your mouse to alter your hit box , but the game already allows Yes its a thing in the game. However, the reason you don't notice it is because it's totally useless therefore no one is doing it.

This is a minor addition of combat based on games from the late 1990's. It was later expanded to be closer to a similar game to the year 2006. The game also had an identical system.

Honestly i am shocked at the reaction given that, as far as changes come, all the information contained in the doc on detail may already be present mechanically in the game in a different way or is a quality of life change.

Everything here could be implemented with minor changes to counter. Modifications that would benefit the games longevity and replayablity of the game this is really is to the benefit of the game.

You are trying to fix the fight incorrectly

In short: let's add more powerful blocking and parrying, so those who attack first are nearly guaranteed to lose.

I believe that you're trying to solve the fight in a wrong manner.
If you want to learn more about Dark And Darker,please vist https://www.mmoexp.com/Dark-and-darker/Gold.html