A interesting map but a shorter turn limit and truncated tech tree might help. I played the Empire and won a spaceflight victory at over 500 turns.

Theres a real lack of resources in places in my opinion. North/West seems ok but I struggled more in the East/centre. Large map with sparse resources means you expand slower and dont find each other until after unique units are gone/obsolete. Needs more Iron(always seems to be 1 per mine and not many mines about).
Can you implement race starting locations as per the lore?
I like what you've done so far.