I built phase gates connecting my major factory systems, in order to let those further back help the front lines. However, when queuing from my fleets, it still only uses the closest systems, ignoring the phase gates that should let the factories all the way in the back immediately send ships forward. This drastically reduces my reinforcement rate as instead of 12 factory systems helping, only the 3 closest are. It seems phase gates only get used for manual ship movement and is ignored by queuing, which makes them far less useful than they should be.