I really like how you've improved the information that pops up in the lower left when you mouseover a fleet or colony, so thank you for that. I find myself sometimes looking at the screen, and just seeing a snow storm of dots and lines. I often wished for colony names to somehow be inobtrusively on the main display, like a real starmap:

Obviously you would only want to do this at the more zoomed in levels... so you don't render the display an unmanageable mess. Of course given the thickness of all the lines you're drawing, at a certain level of density the mess happens anyway.
While that would be prefered, you COULD more easily have the lower left information panel display as its default (i.e. if nothing is being moused over at the moment) the information of the colony that the map is currently CENTERED on (or the fleet info, if the screen is centered on a fleet.) This would have the advantage of knowing what you're centered on at a glance without having to click on a thing, and it doesn't seem like that would be much work at all to implement because its already all there.
Let me know if I explained that horribly and I'll take another stab at it.