Some UI suggestions:
On the galactic map, an option to update the system map to the currently selected system. It would certainly be easier to navigate around with, rather than only a drop-down list of systems in alphabetical order. There is the system map button on the galactic map, but that only moves the system map to the selected system if it's closed, if it's already open, it doesn't seem to do anything(perhaps a bug). And in any case, it would still be easier to navigate around with a single click for something like this. Also, for the OOB tab, options to exclude shipping line/commercial/etc. ships from the list.
On the system map, some way to transition to the system on the other side of a selected jump point would be nice. So, say for example you have a ship that you just watched go through a jump point, and want to change the system map to that system to continue watching it, you could control-click the jump point, or something like that, and the system map would change to the system on the other side of the jump point.
On the Ships screen, individual unit details, to be able to transition to the fleet screen for the fleet that the selected ship is in. It would also be nice if there were an indication of where the selected ship's fleet is located, and what it's currently doing. The ability to organize the list of ships by fleet or location would also then be useful.
On the Fleet orders / Task Groups screen, to have something similar to the naval organization screen, that would automatically list task groups, ordered and arranged by what system they're in. Although the order of battle button on the galactic map is already nice for this.
On the Task Force Organization screen, simply the ability to sort the list of task groups by their headers. So that they could be sorted by their location, or simply a list of them by name, or so on. Also, a transition from the list here to the fleet orders screen by clicking, or right-clicking, or something.