our interactions with mortals are often limited

Isabella is interviewing shades. It's easier to control PR from here - if she doesn't want to send one back to the living, she doesn't have to, and anything they tell their dreaming friends is hearsay twice over with no chance for soundbites or recordkeeping - and they have nearly as much up-to-date information about their worlds, if she picks the right ones. Simultaneously, Jane is feeding her books and news articles and her personal impressions of the things that have gone on recently. (Isabella already planted ansibles in all the other subworlds with Internets for her.)