What if there was a possibly to perform an EVA while in orbit? EVA is extra vehicular activity and it basically means leaving your space craft while in orbit of a planet.
I think that this would be very cool as you could use small thrusters on your backpack to manoeuvre and fly around. Another cool idea would be that there could be asteroid belts that you could visit to mine exclusive ores on or construct bases. I honestly think this at least a decent idea that would be quite interesting if it were to be implemented.