I've not really worried about the actual game mechanics too much. I expect most of that to get fixed over time. My issue with with the interface, as its currently wildly counter-intuitive. Below is a common radar map, with a cursor showing the exact location and a flag carrying details of the whatever the object is. I would like something like this as standard on the zoomed out map, with it appearing when you mouse over a object when zoomed in. All of the functions like creating a starbase, combining or ejecting units from a fleet should be activated by right clicking.
The main screen drop down of the fleets and starts should allow the units to be grouped under fleet markers so you know which ships are part of which fleet.
That's it. The rest I'm sure will be resolved over time.