Wasn't in beta 1, so this is utter newbie "never launched the .exe before" feedback.
Hooray for alt-tab working!

Command remapping doesn't warn about duplicate mappings.
LOVE having all the mappings on the left hand!
A way to make the empire icons a bit bigger? Are they resolution-dependent? On a big ship the empire icon can kind of get lost.
How about pinning the camera to a ship so the camera travels WITH the ship like in Homeworld? Can't find a way to do that, and I REALLY REALLY MISS IT.
Need tooltips over the various numbers in the control panel. (What is + 3246, etc.?)
OK, I totally broke the tutorial. It was explaining the connection lines between stellar bodies, and it said "Move your fleet to the end of the Connection Line."
WHICH end? The end right at the starting planet? I wound up moving them all the way out to the asteroid field -- in other words, the OTHER end of the Connection Line -- and then all the way to the distant planet!
My frigates got blown up by the defending frigate, and then my cruiser ate everything for lunch, then I moved my cruiser all the way back to the starting planet and the tutorial was stuck -- it never moved on from the "Move your fleet..." popup.

So I think you need to be a lot more specific in that tutorial popup, and you also need to prevent people from going the wrong way if you don't want them jumping to other asteroids yet.
Time for bed but I'll try again tomorrow, hopefully I'll figure it out

Anyone want to tell me what I did wrong?