Once I had a huge sphere ship prototype face-plant into a planet. Had to slowly roll the thing off. Granted that your run of the mill Oreo shaped planet will soon be a thing of the past, and there will be no edge to fall off..
Snako's Gravtanks actually sound pretty awesome, only having enough thrust to keep them off the ground when flying at "top speed" straight up. Makes it super awkward and silly to be the flying yo-yo bobbing up and down once you get inside the atmosphere.
Once thrusters finally reach their final balancing act, this would be a good figure to know.