Okay, I am almost certain these have been listed... but...
- A "web" plasma field weapon ala the Tholians from the original Star Trek series
- Leaders with traits ala the MOO series for Fleets/Ships/Systems
- A Space Elevator as a component to complement that Space Yard facilities to speed those puppies up, or possibly some other use. It just sounds so cool to have, I just want it in the game
- Greater range of racial characteristics