I'm writing a script for a preliminary correction for this footage
I use vapoursynth instead of avisynth,plugins and scripts are the same, but vapoursynth can support a full chain in 16 bit precision.
After my script it's necessary to do an s-curve for contrast,vibrance, and again sharpening
This screenshots are from the original on myspleen ,probably the raw give much better results, and this is not only my script but a complete color correction
http://screenshotcomparison.com/comparison/128920