It would be nice if we can specifically determine which building(s) a facility has to import from or export to. For example we should be able to set a firewood splitter to stock only said stockpiles. The current filter system in the game does not help since when you have multiple storages with the same allowed items it becomes random again or based on distance. Please check the game called “Captain of Industry” on Steam for a referrence. Logistical zones would serve a simular purpose. We would assign labourers to a custom zone so they would only be working for that zone.
Another suggestin is to add means to transport food items with an equivalent of a wagon or with the wagon to complement this system. This would give us better control of our resources and make expansion easier.