As a player who interacts a lot between the own planets I got the idea of a fifth option in the category "mission": fetch.
An example: I got a ship on planet A and resources on B. I select a ship on Planet A and send it to Planet B with the command fetch and input the max resources that the ship should bring when returning (If there are less recources, t should bring all of them). This would save half of the required actions to transfer resources from B to A.
An example: I got a ship on planet A and resources on B. I select a ship on Planet A and send it to Planet B with the command fetch and input the max resources that the ship should bring when returning (If there are less recources, t should bring all of them). This would save half of the required actions to transfer resources from B to A.