just a thought that came to me that would be usefull
a colored ring around the shipyard when you select it while "unanchored" (or possibly a show radius button ) that shows the effectiveness of the resources it recieves
green >= 75% of resources recieved from planets in green ring
yellow 74-50% of resources received from planets in yellow ring
orange 49-25% of resources received from planets in orange ring
red <25% of resources received from planets in red ring
this would allow the player to readily see how much of a loss they are taking and whether it will be better to build a new shipyard or to send resources to an existing one