Hmm, I hear you, but there is also truth to weapons being built to do certain things. There is a reason there are so many variations of melee weapons throughout human history, and it isn't because each melee weapon did the exact same thing to the human body. I am going to avoid the true realistic argument that certain weapons wouldn't ever get through certain armors, as I hate mechanics that make a player completely useless no matter how hard and good they fight an opponent.
As an example of weapon variation for damaging affects, arrows alone had so many differing heads, and one of them was a large type of squared pyramid head meant specifically for causing massive bleeding if it managed to puncture the skin under the plate armor. Weapons had differing blade styles and end styles based on their affects and how well they would be in said battle conditions. Curved blades are great of mounted combat because they slide into the flesh and out easier without snagging and causing the rider to get pulled off. Or, axes and maces that had a large square pyramid at the end, which was used to puncture holes into large armor and more importantly the body. You try stopping the bleeding on a square pyramid wound in your abdomen; going to bleed much longer and more than if you were slashed with a fine blade and could close/sow/treat the wound easier.
Also, there is already a mod that does much of that. I believe physical combat and armor overhaul actually makes very similar changes to what you propose below, where certain weapons are more affective against certain types of enemies. https://www.nexusmods.com/daggerfallunity/mods/76
I want to try to replicate the feeling that you're actually slowly wearing down and damaging your appointment to death, and these affects to me are the best way. Setup on my Skyrim build, it made combat feel really engaging because every hit had the potential to change the combat. I guess this is what I'm trying to kind of replicate with these affects.
Man, does my composition major come out on these forums. I can be so long winded. Thanks for the input.