I would say liquid surface instead of water alone. It would require some modifications like hull resistance to pressure, info about thrusters working in liquid environment, depth hud indicator with red mark indicating dangerous depth level- this can be simple constant variable set for each planet/moon in relation to gravity and liquid type- just to make things simpler. That would also pave way for gas giant atmospheric flight- the same thing can be applied to air pressure since ship would have stat staying how resistant to pressure they are. We can already assume ships are extremally resistant to heat and radiation from the simple fact of scooping fuel from the star.Of course, I would not say no to a Moray Starboat - with bodies of liquid water on planets to explore....
I also think it is easier to add liquid generator model to planet generation system than plants and animal life to terrestial planets.