I think what bugs me is that there are so many hints that this series'll be played for laughs a bit more and I hope theres plenty of creepy strangeness to balance that out a bit.
Not sure why you think that- the climax looks set to be a proper tear-jearker, I get the feeling. A bit of a climax to the previous four years. And the Ood episode has just been classified a 12 certificate for its DVD release, so there's definitely some spookiness coming up. Even this weeks' looks a bit dramatic, with Donna questioning how the Doctor can choose to save some people and not others.
Because of the presence of Miss Tate. I got the impression that she'd been shoehorned into a part meant for someone 15-20 years younger in order to inject a few more one liners.
Oh that's odd; perhaps they've misjudged that if that's what people are thinking. I think she's there more to be more of an equal to the Doctor- she's not in awe of him and certainly doesn't fancy him (which makes a nice change). Her being slightly older than the last couple of girls adds to that, and she is a bit of a better actress than Freema, although I liked her a lot. We should see that side her character this week when she starts questioning the Doctor's actions, I think. Personally I think the relationship has more potential to be interesting than with Martha, and Tate's funny too.
Also, the interview with RTD where the daughter thing was mentioned, to me it implied that we're intended to chuckle at the incongruity of it rather than it being something which adds to the Doctor's mystique.
I'd be surprised- I would have thought it'll be a bit more of a character piece, but with action and laughs- you don't get a Who episode without those.
I think the Agatha Christie episode will be slanted towards comedy, but other than that I haven't heard that any others are heavier comedy. Steven Moffat (writer of Blink, Empty Child etc.) has done a two parter this year, which'll be sure to be super-scary and just generally fantastic, I'd imagine.
A 12 classifcation sounds promising for people like me who want episodes that make kids wet themselves. But might it be a different edit to the one that'll go out at 6 o'clock on a saturday?
No; they don't do that. I think a couple of other episodes were classfied 12 on release- Blink may have been one of them.