In a ideal display and perfectly calibrated, you can almost see the 17 bar, and progressive see more and more detail in blacks. With the GO, only you can see from 21. And there isn´t any control of the image to adjust this. The White clipping is correct, indeed.
So, there is any form to tweak brightness to make a fine adjustment?. As the GO is created with multimedia playing in mind (apart of), will be good to see details in the blacks and avoid that back crush!.
No, this is not the point. In a normal LCD screen (TV or monitor), I can adjust brightness to show all these critical gradations near zero. It can be visible in a LCD screen, but the whole black isn´t 100% black due the backlight. The problem here is that there is some adjustment over the brightness at system level that make that black crush, I think.
Will be good if in future upgrade that black crush will get fixed.