I think the "preview" lever by the power switch should work in the following way:
When in "digital preview" flipping this lever displays histogram data, distributed between 2 screens. The composite histogram should be shown in conjunction with the color histograms, as it currently is on one screen. It should be eliminated on the the other screen and replaced with a vertical row of options as below. Please see attached (crude) JPEG.
1)
White balance- make this dial adjustable from 2500-10000K with optional fine tuning, as allowed under the "Fn" menu. No need for "taste" options
2)
Saturation, Sharpness, and Contrast- as seen under the "menu" button. Currently, I can't see in real time the effect of adjusting the settings under "menu".
Also, the white balance editor in the JPEG developer under "Fn" should allow for dial adjustable Kelvin settings. As is stands, only the 3 that were chosen in the white balance settings are displayed. Furthermore, the white balance should be Kelvin adjustable in the "Digital Filter" under "menu" when editing JPEGs in camera.
I think that these additions would greatly enhance an already super camera.
John