Arrows Instead of Bow Strings

A.Net should replace bow strings with arrows. I mean, bow strings are not upgrades in real life. At least arrows can be modified to be poisonus and be able to combust...
Arrow visuals should also change, like if you're using fiery bow string, you should be shooting burning arrows to show you're actually doing fire damage. It would be nice too, if they could add a container of arrows at the backside of the characters if you're using a bow.

Bow strings are upgradable.

you can upgrade from fishing wire to sinew.

Nah, they've got the bowstrings there, so leave it as is.