I've got a small amount of suggestions to share, if I could have your ears.
First of all, you gotta add the Hapes Consortium. I believe they could replace Alderaan, since they're miltaristic, at least.
I also have a suggestion for Bespin's workers, that they should be Ugnaughts.
For wonders(great and small), my suggestions are:
Pyramids or Colossus -> Centrepoint Space Station
Great Wall -> Stars' End prison facility
Iron Works -> Kuat Drive Yards
Newton's University - > Imperial Proving Ground(on Zhar, I know it's only for testing, but hell, it might work)
Shakespeare's theater -> Kessel, I know this one's weird, but think of making all those people happy... or not.
I have a resource idea, but it's very unconventional, involving companies instead of materials, but it sort of unbalanced the game.