Hello Kornel et al.,
I have been playing with Scarab since a few weeks and am very impressed - especially the highlight recovery seems to trump all other programs I have tried. Congratulations !!!
One observation on my Sony A700 pics is, that the Vibrance tool seems to work with full strength on skin tones which leads often to pretty unnatural results (yellow faces). AFAIK, (caucasian) skin tones are usually exempt from Vibrance modifications in other RAW converters. It seems that such an option in Scarab could be very helpful.
Best regards!