Late game goals are ofc a problem in these kinds of sandbox games. I think a proper NPC territory system would give some goals to work on for the player long term. Basically I would like to see different factions try to establish control of planets and their orbits. Trying to become the dominant force on each planet would be a huge late game and long term goal for the game. The economy update was a good step forward for the game but we need long term goals in the game as well.