I'm sure that it'll lighten up at some point. Some of the funnest Daredevil stories come in reaction to the darkness, as seen in the Miller and Waid runs.
Interestingly(at least to me) a friend of mine once told me that he would like to see a "science gone wrong" FF movie. He mentioned David Lynch when he was talking about the visual depiction of the Thing and the Torch. He seems to have gotten his wish.
I'm waiting for another trailer or two to really be sure what I think. But I'm interested.
Yeah, I didn't hate it but I didn't really enjoy it either. For one thing I had hoped that they would address the fact that Clara's been lying to Danny about her adventures with the Doctor.