Quality of Life idea: Order Patterns. This is something I think could come in handy for transport fleets. Usually when I spread installations around a system, I have to create a similar order flow - pick up A here, move to B, unload, return to A, refuel. Or if it is some kind of mining colony I add a "load minerals on B" after the unload. This goes in two flavors: do it x amount of times or cycle it.
It's a bit annoying to have to create this pattern over and over again. Now, there already is a function in the game which can save such order patterns - although you can't modify them. Having those as general order patterns in which you "simply" add source, destination and what you want to tranfer, flavored with the option to "auto generate shortest jump route" (which was already in VB6-Aurora), would be a nice time and click saving QoL.
Edit: since C# Aurora is a lot quicker at calculating routes, how about a new command „autocalc route to“. By choosing this command instead of manually creating a route each time a fleet comes to this command, it calculates the shortest route to the target.
Idea is, that in some systems, depending on star constellation, it sometimes is quicker to go through a Lagrange point, sometimes not. This would reflect what a ships captain would normally do, instead of flying a pre-given but eventually ineffective course.