Darknote provides an excellent analysis of some of the problems and failures of the new Doctor Who series. If you are a fan, definitely give it a read.
In the history of the revived Doctor Who series, there have been ten multi-episode stories thus far. If we classify these multi-episode stories into three rough categories of “hits”, “misses”, and “neutrals”, most of them frustratingly fall into the category of misses than anything else. The most recent two-parter helps to further solidify a theory i have as to what makes more of these New Who multi-episode stories disappointing and also touches upon a fundamental problem with the series overall.[From mutli-episode stories in the New Who » darkblog resonate ]
Of course, only fans get to critique the show like this. 😉