Well yes it should, that's one of the great attractions of Capaldi, well for me anyway, that it has gone back to the darker, grumpy, hartnall and baker like doctor.
You are however going to get people who prehaps only like doctor "new" who are going to say they can no longer watch it with their children. Although our parents watched it with us and it was dark.
Stephen moffett is also pretty good at the dark, well turning every day in to the most terrifying thing ever, a child looking for its mother should not be scary however "are you my mummy" is possiably the scariest phase, and stone statues are not scary, well as long as your looking at them and you don't blink.
As for some of the lighter, what you call more far fetched story lines, I think there's a place for that in doctor who too, Matt smith, and Patrick trout on were partially good at the humour.