As someone who hasn't tested the mod yet, can you explain to me how this affects the pace of the game? By this I mean, do battles take much longer to complete, and how much of a knock-on effect does this have on progressing through a campaign?
Just to point it out in very simple terms, so that it's immediately obvious. Bannerlord desperately needs the battles to be longer.
What good is an "epic" battle of thousands of troops if it's over in literally under 5 minutes?
I cannot stress this point enough, but these short battles are a humongous detriment to the game. I am by no means saying that we should go to the other extreme and have Total War-esque battles that last for up to an hour. Absolutely not. But 10 minutes for a decently sized battle should be the minimum in my humble opinion.
However, that would require for battles to incorporate some maneuvering, as just 10 minutes of hacking and slashing isn't the way to go either.
In short, longer battles are a must, but it will take more than just making the units more resistant to damage to do it well.