Rebuilt half the hull, added some indentations, rebuilt rear lower section of beam
Some extra piping in engine room walkway
Better furniture in crew quarters
Solved water spilling issues in bathroom (shower now can be closed)
New fancier engines
SHUTTLE! With hangar!
Better cargo processing logic
Removed a hole behind pilot's control deck (that nasty one, so hard to get out of)
New cargo pick-up system, no pier needed.