The Panopticon/Default appearance of the Tardis without chameleon circuit

I really feel that the BBC missed a trick last week when they showed the cylindrical "default" Tardis shape without the chameleon circuit switched on. In my opinion, they should have gone for basically a big, black, featureless door shape (with the dimensions 1 to 4 to 9). It would have been an amusing wink at Kubrick's "dawn of man" scene in 2001.