So, I loaded an image - the famous SUV example - and popped open the CurvesTransformation process.
Very simply, this one panel allows me to control everything. Each of the RGB channels, the RGB/K, the LAB mode channels, hue, and saturation - without converting modes or switching to a new panel. All of that control in a single panel. Cool! In less than 30 seconds, I corrected the image.
So far ... I'm liking what I'm seeing. All this and FFT too ... !