First off, don't get me wrong, I love the game. I would have it's babies if digital wombs were possible, but there's one thing that I just wish was changed.
In the combat viewer it looks really weird when tiny 'fighter' craft are moving the same speed as huge 'heavy cruiser's. I understand the physics behind how they would most likely move the same speed in the vacuum of space, I just think it looks weird.
My own idea of what may improve it is just a simple thing. In the battle viewer, the different hull sizes have different turn rates and movement speeds. Such as this
Tiny: 1.8 X normal
Small: 1.4 X normal
Medium: Normal
Large: 0.7 X normal
Huge: 0.5 X normal
Cargo: 0.3 X normal
Not much of a change, but I think it would look alot cooler to the eye. Instead of slow moving ponderous craft turning and moving at the same speed as quick agile fighters, this sort of change would make things look very cool.