Yes, my girls (Lucy 6 and Katherine 10) are huge fans of Mary Poppins and would have loved this.
But, if memory serves it was replaced by the Princes Breakfast, which we did go to, and where they were welcomed by Mary Poppins and Bert, and then met Cinderella, Belle and Beast, Aurora, Fairy Godmother, Aladdin and Jasmine and Mulan - so they were in heaven!
This has now also be dropped, but has shifted to a Princess Lunch - reviews of it continue to be mixed, but for two little girls it still seems like a dream come true.