option for the compression-rate of lurawave-files

[unquestioned2]

A possibility to choose the compression-rate for lurawave-files is missing.

nconvert -out lwf -comp_ratio 94 -o C:\AMD\%%.lwf C:\AMD\*.png

converts png-files into lurawave-files, but without compression,
so that they have a greater size than the png-files

with a working switch like -comp_ratio or -q for lurawave-files
the "problem" should be solved

Therefore I don't get the difference between the baseline and the progressive mode of the lurawave-format.
The filesize is the same and I can't spot a difference between pictures made with these modes.
Has anyone an explanation for this?