The way I would like to use this would be to see a list of all projects discussion boards showing up one after the other, not unlike this view: https://itch.io/board/10016/itchio . Where each board is the project's board.
As for having an account-wide general discussion board associated with our account would be nice, I would route all discussions there, some people find GitHub issues quite confusing, this would be a good place to talk with our patrons.