Some suggestions for RT

I wholeheartedly agree with this. It would make learning the software much easier for new users.

Alternatively, have an “express” mode that exposes only the most basic and important functionality for new users, and stick the advanced techniques (e.g. Retinex filters) in an “advanced” mode.

I think “contrast by detail level” is redundant with the wavelet edge enhancement, by the way (as in it is strictly worse).