http://www.doctorwhotv.co.uk/andrew-cartmel-thinks-timeless-child-depletes-the-mystery-of-doctor-who-93918.htm
Classic era script editor, Andrew Cartmel, has criticised “The Timeless Children” canon changes, arguing he believes it “depletes the mystery” of Doctor Who.
Speaking on The Legend of the Traveling TARDIS Radio Show, Cartmel said: “I think as soon as we delve into the minutiae, into the fine detail, of what Chibnall’s done… Chibnall’s obviously done a reset on it, which is great, but as soon as you start to specify that reset you’re back in the same old problem that you’re explaining too much. You just want to say ‘what you thought you knew was going on you didn’t, it’s much more than that’, and leave it there.”
As classic fans will recall, Cartmel himself planned to implement a backstory for the Doctor during his time on the show, affectionately known today as the “Cartmel Masterplan”. However, Cartmel wanted to only tease the Doctor’s background, retaining the mystery. He thinks “The Timeless Children” is “too detailed”.
He elaborated: “All I wanted to do [with the “Cartmel Masterplan”] is throw the Doctor back into shadow again and just give hints of what was going on. And [with “The Timeless Children”] there’s a lot of detail in specifics, which is the last thing you want. Number one: it depletes the mystery, and number two: that was the chief failing of the Moffat era.