Drag and drop is inefficient. It's great to have it, but not when it's the only way to add drivers/cars/whatever to one list from another. It would be better, especially for big races, to be able to select multiple people/cars and drag the group, to be able to use the keyboard to tab or arrow down/up to a driver and hit enter to add them one at a time, or even to have a "select all" option to add the entire list to the next race.