This is getting dangerously close to suggesting something on the "Do not suggest" list but my idea is different enough from the 2 things linked to there so I'm going to put it out there anyway. I will respect any mod's opinion that this is breaking a rule, but hear me out first While reading the Should KSP have a Delta-V readout? thread I had an idea, where you could draw a Planning Node in the tracking station, which is just like a maneuver node but you make it as if you were flying the planet