As it is, you can set your throttle to whatever, and it stays there after leaving the helm. This is useful at times. However, the wheel auto-centers. This is ok most of the time, but there are times when you would want to lock both the throttle and wheel in place for sustained turns.
What I suggest is actually a common sight on real ships, a loop of rope that holds the wheel wherever you set it. This could be done in two ways. A keybind (such as hitting space), or a pilot tool (such as rope, or auto-gadget). Given that this frees the captain to man a gun or fix things, while the ship is still able to circle a target a simple keybind may be too advantageous. A tool, on the other hand, would handicap the captain in other areas in favor of auto-circle.
Another possible feature of a rope/auto-tool could be the ability to set the balloon to rise or fall as well as helm rotation. This would help in those annoying situations where you are bouncing on the ground and the AI engineer thinks the flamethrower is the most important thing in the world to fix at that moment.