RGB Curves: add proportional editing ability or copy paste

The picture above shows a mockup of the rgb curves node with the proportional editing icons included.

It would be nice to edit multiple points on a rgb curve at once without shift clicking them. perhaps this could be another mode you could enter if you press "o" shortcut to proportional edit curve. I am open to other ideas perhaps pressing o gives a whole range of tools like copy paste. ctrl c ctrl v shortcut certain point parts of curve to another rgb curve node to use further.

Copy could be a 1 to 1 match where you select 2 out of 3 points then only 2 would be copied.

Alternatively copying could work by first selecting a single point and ctrl c copies everything to right of that selected single point.

Other selection tools like select box /select lasso could be useful.

Obviously if its more tools than just proportional editing get added it may need a button to press or shortcut to enter a more user friendly mode. Bezier curves/ handles could also be helpful addition to tweak the RGB curves node as it is common in other areas of blender.