As I have already said elsewhere many algorithms used in photography are empirical or rough , as WhiteBalance, Color Management and sometimes with no real scientific basis as Retinex…
But it works, and it is the main result
The choice between “High”, “Low”, “Uniform” is dependent on the distribution of luminance, the more we will have highlights in the picture more likely “high” will be recommended … but the best is to try.
if I added the 2 equalizer, it is obviously not for the developer’s pleasure 
but because it seems to me a necessity. The use is not obvious, and thank you for emphasizing the utility of these 2 curves.
I understand what you mean for “Settings” and “Equalizer”, it is a GUI problem. I’ll have a look, but without warranty
Retinex in Wavelet add wavelet complexity, and I think it’s not very easy to have good result, but it’s allow work on JPG, TIF,…
For including “waveletnew” in “dev”…I don’t know
And many thank you for your testings !
jacques