Overall nicely done map. You can see there has been attention given on details.
Only things I can think of that could be improved. Those are only suggestions.
Maybe:
1) Fix that moon that merges in a Barren planet.
2) Make certain planets are no so near one from another. This is not realistic the gravity would make them collide.
3) Maybe put pathing blockers doodads around planet so your ships don't just mfly trough.
4) Oh... maybe make some asteroids fields in wich your ships can collide and get damaged. Maybe even give some movement to the asteroids.
5) The worm hole is a nice idea but extremely hard to find. I think it took me like 20 minutes before I find the one in my galaxie. Make it easier to locate.
6) I truly believe you need hyperspace technology on some spaceships using blink ability. To avoid over powering a player. You can raise the cooldown of abilty and the manan cost. ALso you can make it with levels so the blink range limit varies form minimum distance to maximum range.
Did not play it multiplayer, but seemingly has alot of potential.