The season-long "Bad Wolf" thing was tolerably nifty,
No it was not.
It was one word, plastered about the place, with the end explanation being
"err...just because."
[/old rant]
I'm all for long storytelling and big story archs, and would love too see that in Dr Who
But they would have too be handled properly.
Storyarchs raise expectations, and require viewers too more critical engage with the show. If you cant pull it off, its best not too have them.
Leave them as 2 or more parters.
As for the Daleks, Id like less of them, but I don't feel this recent plot is bad at all.
Acting intelligently, showing inner conflict, and showing them as more then mindless killing machines.
Far better then the Borg, imo.