I like the realistic nature of Kerbal. Anything that can go wrong IRL, I'd love to see in the game! Even my failures are EPIC in KSP It is the reason I never get bored. Sci-fi engines and models would be a terrible idea. However, there is a difference between sci-fi tech and POSSIBLE tech. Possible tech is a great idea! For instance, they are currently developing microwave-type transport systems that will be far more effective at launching us deeper into space.