I agree with you on how frustrating it is. I am thankful to Steinberg about how many things you can modify and export and access like key commands and other preferences that they have broken out. I have depended on that with symbolic links and dropbox for a lot of my workflow which is not possible to the extent it is in Cubase in Pro Tools.
This, of course, does not excuse the need for figuring things out like exporting preferences. Hopefully, they can figure a way to keep it working with a single preference file in Cubase and Nuendo and they just disregard things they don’t have like they have done with their key commands for years.