Only 'Color Picker' is missing
For fine tuning a user would likely use the whole light spectrum. Thus should know the color spaces well.
And when .cube comes in... one will simply use presets from CC app done on real raw footage. Having ability to use it directly in RT favorite render engine will cut down times & extra work immensely.
IMHO... On Corona forums, Juraj is complicating things a tiny bit too much. Focusing on photography which still has lots of remnants from the analog era. Learn it for yourself...