I suggest that an "Land on assigned mothership" default order is added to the list of possible default actions.
This would make it possible to send out e. g. fighters to do a job (e. g. surveying a system) and then have them automatically return to their mothership when the job is done.
I found myself missing this feature when I started experimenting with a exploration carrier. The carrier would bring 6 geo survey fighters and 6 grav survey fighters with the primary default order set to the appropriate survey order. With the suggested feature, I could've set up "Land on assigned mothership" as a secondary default order, and have them return to the mothership when they ran out of stuff to survey.
(I ended up using "Follow higher order fleet in system" as the secondary default order, and then recover them as soon as they came back to the mothershi as a "work-around")
Obviously not the most important feature suggestion, but it would be a nice feature to have in the game in my opinion. I also suspect that it would require a relatively low amount of code to add the implementation.