_,,,^..^,,,_ said:

It is a side effect of BD correction... I could always leave the BD "as is", even when using 50/50 mix; it will regain some details lost in the shadow, but the contrast will be overall not correct IMHO...

Here you are the difference:

http://screenshotcomparison.com/comparison/64629

in my calibrated TV, the increased contrast outweight the tiny shadow details lost; what do you think?

I guess you're right.

Not that I forget: I didn't like the version that much where you lowered the saturation. It's lowered too much in my opinion.