I hope KSP2 follows up on the discovery of Earth in the Kerbal Chronicles by allowing us to travel to Earth and collect artifacts. It would also be cool if the game went into more detail about the Kerbals' societies.
Do you guys think that propeller engines should be added to KSP? Propellers would serve as precursors to Jet engines in Career mode. They would have less thrust, but would drain fuel slower. They would also be cheaper than other jet engines.