Include a world scarce resources
Well .. This idea may sound crazy to anyone who has less than 500 or even 1000hs of play.
But with my 4000hs of SE I believe that there are already enough players with my same feeling.
Over 99% of the servers use the easy start world. This is only good for the newbies, but soon they themselves are missing something when they finally make their megalomaniac grid and end up abandoning the game (often temporarily).
There is no challenge of being a supplier to a market station (for the trade mod), challenging very aggressive pirates (mod of custom pirates) and facing a severe gravity of a planet that has only a lot of Uranium or Platinum.
The possibilities of distribution of these planetary resources are many. Explain your ideas.