Every time you open the map you download the area near you, its not saved on your computer (hence no single player)
Combat is shallow (yaw is 1/5 the speed of pitch, also they are both slow like you are turning in water or something) so therefore is the kind of game where you fly in circles for 10 min trying to get behind the guy while he does the same. (going backwards is not as efficient, and as AI always outgun you, it will not work outside of 1v1)
X combat has atlest different ship sized, Elite don't, they are all basically the same. there is baisically 3 weapons, pulse lazer, mini guns, and continus lazer. With some missles and mines that you will not really need to use ever.
Game is not complete, just like X:Rebirth...
But exploring and how they handle the UI is awesome, there are alot of major feature to be added, its actually less % complete then starsector.