I like the return to more two-part stories. I didn't mind the season opener, but I'm an old school Whovian who remembers the days when sometimes they'd have an entire episode just setting up and teasing the eventual reveal.
My favourite was the Dalek invasion of Earth storyline, where the entire first episode was everyone wandering the London waterfront wondering about the roboman and such, and where everyone was. And then, suddenly, at the end a Dalek rolls out of the Thames and it's all WFT?!?
The ending on the ghost episode was kinda dramatic too. But the second episode seems like it will feel different, rather than being the second half of one long story. Which might be interesting.