Toon Boom Studio 8.1 colours

I am aware of the fact that Toon Boom Studio is configured to work in a way that once a colour has been used to paint a shape or shapes, if you modify that colour, it will change the colours on all previous shapes painted with the same colour. It will also modify the colour swatch on the pallet.
Could it be possible for the Toon Boom programmers to add a function which will allow one to paint freely, like using real paint mixing without having to create a new swatch for each stroke? This would make it possible to create very interesting images.
G. Vrakotas