Look at the Fuji X-Pro-1. It is Leica M9 size and uses a DX size sensor. If Nikon produced a mirrorless rangefinder body this size using a DX sensor and the F-mount it would create a whole new category of cameras for the DX sensor. Perhaps Nikon could create a 35mm "pancake" lens to keep the camera compact.
I know Nikon chose a smaller size and smaller sensor when Nikon created their mirrorless camera so they must have considered this idea and passed on it.
Nikon, it would appear, have decided that the market segment which represents greater potential sales growth for the company lies with the smaller sized camera systems. I also believe the company "has their plate full" trying to resume normal production and development after the recently passed events.
I have noted that there is a big stack of 1 Series cameras at Costco which further confirms my conclusion that the 1 Series is intended to be a much more mass market product than any DX format EVF "rangefinder" camera. Just look at the difference in pricing of the 1 Series and the Fuji or Sony entries.
A EVF DX "rangefinder" would be interesting, but would require yet another new series of lenses as there would be little point in the camera if it only used existing F mount lenses with an adapter.