If there was any doubt to the quality of this show by now, I point you in the direction of The Doctor’s Daughter. This is, seriously, the best thing I have seen in a long time.
Doctor Who is like a packet of Revels. The variety. Some are crunchy (like The Sontaran Stratagem and The Poison Sky) some are chewy (Planet of the Ood), and some a bit surprising and not what you thought you might get (The Doctor’s Daughter).
I don’t see the harm in playing with some of the old elements – there are new viewers to entertain these days, and its something that fans should be used to by now.
Someone wrote down ‘Doctor …. who?’, tucked their notebook in their pocket and went for lunch. Time marched on and they just didn’t come up with anything more specific.