The dummy-player issue came up in my "9,401" playtest. I had about thirty handouts to assign amongst five characters, but since you can't assign things to characters the way you ought to be able to, I couldn't begin until the players had made pro-forma log-ins to create accounts for me to assign handouts to. It would have been miles more convenient to be able to assign everything necessary to characters, or to dummy players who could later be assigned to real players.
After all, when you are playing at a table it is easy to sort handouts into folders or into stacks at places around the table. For that matter you can hand a prop or a document to a player without digging around at the bottom of an "edit" dialogue box.