What does this mod do?

Basically it makes foes with a silver health bar susceptible to steel so you can fight any creature with your steel swords making them more usable. Although silver swords will still deal more damage to these monsters, so there's still a use for silver.

Yes, you can now take on drowners, ghouls and Wild Hunt warriors with your steel sword, which is more lore-friendly in my opinion.

About
This mod was made to be an extention to  Steel is all you need or No Levels The issue with those mods is that there is very little reason, or insentive to use the steel sword, so while you can, you won't.

So to fix this, I wanted to give an incentive to use the steel sword, but I also didn't want to render the silver sword useless, but instead being a boon, something you'd pull out to use when the situation call for it(more akeen to the books). So what I settled on was to increase the durability cost of using the silver sword(accross the board) by a factor of 75(7.5% durability loss on each hit). This way, you will have to be a bit more carefull as to when and where to use the silver sword. Figthing a golem might not be the best of ideas with the silver sword, as it'll easily break mid fight.

However, a new issue arrises with this, in that you are less likely to want to use the silver sword(it breaking quickly), and instead maintain to use the steel sword, as such I've also boosted up the silver sword a bit to increase the damage it does against monsters(default a factor of 1.3). Specters are also made immune to steel, so you have to use a silver sword to fight them(however as in vanilla, they barely reduce durability of the silver sword). 
I do however not touch resistance, so creatures such as golems etc are very resistant against steel swords. Steel sword also do less damage than silver swords, so I have given steel swords a damage modifier(only applied against monsters \ silver-health).