Need to have the RAWs to my liking, colours are too saturated with too much reds to my taste, and exposure is also different compared to the Nikon's.
Currently I don't have any m4/3 camera, but I have used Panasonic G1, GH2, GF5 and GX8 as well as Olympus E-M5 MkII. I have the impression that the light meters of Panasonic cameras have been excellent. Their dynamic range is much narrower than any APS-C or full frame cameras, but the meter makes full use of the narrow DR very well.
I miss the true multi-format sensor of GH1 and GH2 with which all 4:3, 3:2 and 16:9 formats can retain the same diagonal AOV. I could switch from 4:3 to 16:9 to go a bit wider horizontally without changing the lens, which was very handy. This system should also be advantageous for a video-still hybrid cameras.
So, I still keep my Nikon F to m4/3 mount adapter.