I think that locational damage was a great mod for some time, but it also didnt make sense at times. Whiterun guard helmet should stop an arrow in the from top face part but not the back (where there is not metallic plate. arrows should also penetrate it, unless the armor has parts that are hard and would not allow for an arrow to pass. but in my mind the system Bethesda set up for armor was fine with light armor. Then changing the weight of it and movement speed is pretty self explanatory. It IS possible, but i have no knowledge of how. These certain parts aligning it with the textures.
The way a modder could do this is by setting impact data to make it so the arrow bounces off of the armor. An arrow hitting heavy armor should not even penetrate it at all. This should go for the helmet, gauntlets and shin guards/boots. Archery is so messed up in this game and most other games in this way. Arm/legs>Chestplate/Leg Curries damage taken. For example, you are shot by an arrow in the arm, you take regular damage, where this is wrong is when you are shot in the chest-plate you take the same amount of damage. Knowing of many mods that change armor speed and stats, they are good enough to get the feel of being weighed down and being a tank, but heavy armor has a downfall that no one mod thus far has addressed. I know it is possible, anyone willing to help me would be the coolest person ever I am a modder and i have tried to do this myself but i am not the best with scripts and such. As a hardcore immersive/realistic player of Skyrim i have been looking for a mod that changes the way armor works completely.