Not sure if here or twitter is easier and probably over the 140 character limit, but I saw your tweet about how LR imports the raw D750 files.
Have you tried changing the color profile in LR? Under Camera Calibration just after Grain.
The default is Adobe, I tend to use Camera Neutral for disney shots. For portraits I use Camera Portrait. But I'd play with those to see if those yield better results because the Adobe color profile seems super super flat.
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