It is still an order of magnitude smarter than the first season of TORCHWOOD.
I have a hell of a lot of respect for RTD for what he has accomplished with the show, but I think his leaving WHO will be good for the show, and for him. I've thought for a little while now that Davies is developing the same problem as a writer/producer on WHO that Joss Whedon developed as a writer/producer/director on BUFFY THE VAMPIRE SLAYER; in a lot of Whedon's directed episodes, it was clear that he was thinking about his future career as much as or more than he was thinking about doing an episode of BTVS. Seriously, if you watch the eps Wheson directer there are times you get a mental picture of him running down a checklist: crane shot! exotic location! screw with time! Great Director Homage! etc. Davies is doing the same thing, but it's not visuals: he has been trying to demonstrate that he can do Event Movies. And he can, unquestionably; but that's the sort of thing that when it works, you're giddily transported, and when it doesn't, you're left feeling stupider for the experience. Chalk one up for "feeling stupider."
(I've suspected this of other filmmakers, too; I came out of this summer's big-budget GI JOE movie convinced that the reason that accelerator suits are in the movie is that the director wanted to show he could do a superhero movie, so he put a superhero chase scene in as best he could. And it's a great superhero chase scene.)