Leather armor should be an under armor layer
This randomly popped in my head, sorry if this has either been done before or already suggested.
But I think leather, should have a special slot in the inventory to act as an under armor, still providing the same level protection, just added onto whatever armor you're wearing over.
Leather armor right now has no real use, you'll most likely get full iron before full leather, and it makes sense to wear iron over leather, almost like chainmail over gambeson.
Just think it would be a neat idea and it would add use to leather. And maybe make early game progression a bit better too