The point of The Timeless Children is Sacha Dhawan saying “Panopticon”, a Cyberman in front of the Seal of Rassilon, or airing a clip of The Brain of Morbius on BBC One after Countryfile and before Call the Midwife. [...] There’s something oddly funny about Steven Moffat emphasising that the Hybrid doesn’t matter, and Chris Chibnall writing an episode where a Hybrid of two warrior races stands in the ruins of Gallifrey, having broken a billion billion hearts to heal its own.
[...]
It doesn’t open up new avenues; it imposes a shape onto ones that were already there. It’s not an infinite set of possibilities: it’s a forty pound Big Finish boxset called Timeless, starring Jo Martin in an adventure with Krillitanes, Daleks, and an amnesiac Paul McGann, written by the same four people as usual, each of whom will inevitably struggle against the Jason Bourne of it all and opt to tell fairly typical Doctor Who stories instead.

(etc)