I'm still using Capture Nx2. I just purchased a used D750 and that gives me problems I knew before.
Let me explain why I still use Nx2.
The NEF files contain the original RAW-data, camera-settings and an embedded JPG. That JPG is of basic quality comming out of the camera but when editied in Nx2 is replaced by a high quality. So all in 1 file. The file size for a D700 is a little below 26Mb: including the RAW and the JPG.
I can't use Nx2 for the D750. But I can rename them using Nx2, in the same way I'm used to. Then I open them in Nx-D, the free RAW-converter from Nikon. Do some WB and save them as a TIF. This one I can open in Nx2 and save them as a NEF. From here on everything is as usual: one file for the RAW, now TIF, and an embedded JPG. But...now they are some less as 200MB.
I've downloaded On1, a trial version. It's slow but I think not bad. I opened a NEF and did change the contrast to max 100. Saved the image as a PSD file. But when I open that image again, the PSD version, I start with a new edit list. The contrast slider is 0, the image is the edited one.
Example. NEF 26MB. After export a PSD file of 117MB. A XMP file of 2KB and a On1 file of 52KB.
It looks like the editor is saving a TIF file and starts all over again.
My question is now, is this behaviour the same in LR?
George