I saw a number of comments from people who are not long-time fans, but had started watching around the David Tennant period, that they found it baffling, and I kind of felt the same : I watched old Who as it came along, but I've forgotten most of it, and I found myself turning to Pp (who is a proper fan) for elucidation. I hope they don't have so many people steeped in Who myth on this now that they have lost the ability to tell an accessible story.