Standards what they are, I find just the opposite to be true, in fact extremely.
My first Nikon since the D1x (6MP) camera was the D800e, back in 2012. Before that I was either Phase or Canon. The Phase I kept the Canon I sold, overnight.
For my workflow, I still find the Nikon 800 series an excellent platform to work with for landscapes, I don't do studio/wedding so skin tone I can't speak to, but colors, I find Nikon does great. The D810 tweak took this to a slightly better level even still. However I still work up a lot of series taken from the 800e. I use both LR and C1, just depends it seems as both offer great tools and there are sometimes the tool set of LR works better, others C1. When shooting a Pano, I always stay with LR, as their solution for simple one line nodal or non nodal pans is excellent.
I have been doing photography pretty much all my life, digital since 1999 with my first Sony. Color has never been an issue, I just find I can get there.
I also agree that the D4 sensor was a unique sensor that had some great possibilities. But the cost fact to get there, kept me away as the great megapixel count of the 800 series makes for sense for my large print workflow.
I read these negative Nikon posts, and just really don't get it as the Nikon for me offers amazing DR, and color, just using either the default LR Camera profiles or the C1 single Nikon profile. My workflow now involves much more work in LR or C1, very little in CC besides final sharpening and some clarity work from Topaz. But I realize that no two photographers will either see a subject the same way or develop a photograph the same way.
But if the colors are that bad, why stay? I left Canon after 15 years both film and digital as soon as I saw the range of a D800 file (here on Lula and Fred Miranda), and have never looked back.
It's also been shown again and again on this site, in countless reviews and comparisons.
Back to the OP, Nikon's Future? well they have made some good and bad calls IMO, but they seem to be making more good than bad currently. But if the whole world decided to go mirrors and EVF only overnight, both Nikon and Canon would have some serious catching up to do for sure.
Paul