I am not sure myself about the possible effects of my suggestion on the game, but I'd like to share it here for discussion. How about such a transport mission that you can send empty cargo ships to a colony to fetch from there? And/Or, an option for transport mission that you can set the point of return after unloaded its cargo - i.e. your transports are launched from colony A, reach to colony B, unload there and return to colony C.

It doesn't have anything to do with JG...
And also return point is interesting for me