Apologies if this has been covered previously, but i think it would be very useful if you could create/edit/delete resource lines in a visual layer that removed the possibility of deleting other objects and also meant that you could put lines into adjacent cells without them joining and thus creating problematic webs (in my case anyways, poor planning).
I think it would also be good if when you deleted a conveyor or a resource line after a junction point that the now-obsolete arm would disappear. But that’s a minor aesthetic thing.