This applies both to Single player and Multiplayer, but I'm only adding it here.
Basically, I would like a quick way to access some "important" positions on the power controller. I.e. on a modern power handle, where you can move it from Neutral, to the 0-100% power zone, if you are at 100% and you want to quickly set power to zero, you have to keep "-" pressed for a long time until it reaches zero. It would be nice if, for example, pressing "Shift -" would snap it immediately to zero.
With a rheostatic controller, we have several "resting" positions, the ones marked in green on the HUD, where we can travel without resistors inserted, so without overheating problems. It would be nice if still using the Shift key, or any other modifier key, we could "jump" quickly to those positions (i.e. 0, End of series, End of series/parallel, End of parallel). After all, in reality, we can quickly move the controller to the desired position...