Option to adjust AO, Caustics, Global Illumination...individually

[aerial]

I guess that KS, like most renderers, internally composes various render passes like that for ambient occlusion or caustics.
Thus it would be nice to have sliders on the image adjustments page to manipulate the weight of their contributions.
For instance, if one likes stronger caustics one could just increase this one weight without restarting the rendering or any
adjustments of the lights or materials.