my main issue with the DK-17M is it doesn't work right for eyeglass wearers magnification is too-wide
The problem may be in part facial structure. I've known people who had more problems using a Nikon FE2 with glasses than I had which was minimal. The FE2 had a eyepiece magnification of 0.86x with a 50mm lens focused to infinity. The FM3a (FE3) had a viewfinder magnification of 0.83x which gave it better eye point for many users without reducing focusing ease noticeably.
I'm probably repeating myself but I could use the DK-17M with my D2H, see the complete frame and data while wearing glasses. That gave me a 1.0x viewfinder magnification with 50mm lens focused at infinity. That made the D2H quite suitable for use with manual focus lenses although I had major issues with the D2H regarding dynamic range and color balance issues. I have not been able to use the DK-17M with my D800 and D850 with bifocal or reading glasses. Although I can see the complete frame and data without glasses then I am unable to use the rear LCD monitor. I could not use the similar Nikon DK-21M eyepiece magnifier with my D300s.
Clearly Nikon is aware of the eye point or eye relief issues of eye glass wearers or they would never have made the Nikon F3HP (DE-3). I wish Nikon would make a 1.2x eye piece magnifier using Fresnel elements that was designed specifically for eye glass users. I'm quite sure such and eyepiece magnifier is possible.
Dave