12 - there should just be a quiver slot, like there always was in the older games, and regular missiles (arrows, bolts, perhaps even bullets if we ever get slings) should also be a thing. The magical arrows could be more abundant, perhaps with separate rarer versions that do damage AND create a surface, and the more common ones that just do extra damage.
13 - a great idea, actually.
14 - I think it does? I definitely had a mishap where a potion thrown at a dying character killed them by doing 1 damage.
