The Lucasfilm Story Group is involved with ALL aspects of the Star Wars universe. The books, the games AND the movies.
Kennedy is not the creative type. She started out as a producer and has remained one throughout her career. She's made it by finding the right people for the job and trusting them to do what they were hired for.
When George handed off the company he told her who at the company had the knowledge and experience to manage the brand and they've continued to do so under her management.
When it comes to decisions about where it should head she trusts them because George trusted them.