About the distance between the center of roll and the center of gravity

Teacher, I would like to ask whether the distance between the rolling center and the center of gravity has a great impact on the handling of the car body at the 4 minutes and 30 seconds of the lesson. Is the shorter the distance the better? There are 7 minutes and 30 seconds left to introduce the motion of the rolling axis of the car in three-dimensional space, what does it do?

The further apart the roll centre and the centre of gravity are, the more the car will roll while cornering. This can be worked around with stiffer springs or anti roll bars however a very stiff ARB will compromise the suspension movement so this is more of a bandaid. There isn't a 'perfect' distance that you should aim for and the roll centre height isn't the only consideration. You also want to consider the front and rear roll centre height together as the gradient of the slope will affect the handling balance of the car. In this way, roll centre height can be used as a tuning tool by raising or lowering the roll centre height at one end of the car while leaving the other end as it is. We also need to consider how the roll centre moves around as the car pitches and rolls - Ideally we want the roll centre to remain pretty consistent

Is it generally correct that we want the roll center for each axis and the COG to be lower than higher as long as our suspension can manage a lower RC (i.e. deal with negative impact of low roll center on camber, etc.)? doesn't a lower RC lead to a more consistent RC? and specifically if the car us slightly understeering mid-corner (let's assume it is lower speed corner so focused on mechanical grip), wouldn't this suggest to lower RC?