Yes ...
One of herbs can be used in making antidote potion ... dont remember wich, its by that big cauldron Nettie is cooking, recipe lies next to it.
About the rest ...
Who the hells know.
We were promised some kind of crafting system (there was even hotkey for it and icon on minimap ... not sure if hotkey still exists, but icon is gone), but that was long time ago and it was never mentioned again, so its quite possible that crafting ended in "cut content" box.
