Thank you for this contribution. I think it's an elegant way to accomplish the goal. Is it possible to integrate this type of solution into the upstream script I linked such that if ~/.vnc/config exists, that would will invoke Xvnc parsing the file, else use the workflow upstream has setup?

Again, the goal I should have mentioned in my original post is to have upstream (tigervnc) review and ultimately accept this modification, so I can't implement in a wrapper script as a one-off. Thanks again!