Lelouch has gotten better at piloting. His piloting skill would be decent, maybe even high since he now has the Shinkirou, which was basically made for him. His charisma and intelligence are maxed.
CC clearly has pretty good piloting abilities and her intelligence is also likely high. Her charisma is probably decent since even though she is just seen as Zero's woman, she was able to lead the Order in Lelouch's absence.