I'm thinking getting every ship to be not moving relative to the planet they are orbitting would be pretty much impossible. As technically every ship is changing its speed all over the place to make them look the way they are now, and certainly isn't the most efficient way to have ships in orbit.
Imagine the fuel costs! They would have to be powering the engines constantly. D:
However, it would be one hell of a pain in the arse to deal with ships constantly floating off all over the show as they constantly orbit the planet or move off due to being all in different inertial frames. So keeping it the way it is would likely be best.