With the current real F1 season paused, and the F1 Virtual Races and Championship taking place, surely the absolute killer feature would be to allow players on all devices to live stream the position of the cars in the F1 race to their F1 game as ghost cars, so that everyone can 'race' against the champs in real time, and if they can't do it live, that people can import the race locally and do the same thing. Must be a perfect time to do it.
When the real races start again, the same idea could be applied to the telemetry of the positions of the real cars.
The marketing opportunity for Codemasters would be immense - not to mention bring something really exciting.