In case other people would prefer no specific spoilers, Ill keep it general.

More Gwen and she is so dull and they keep saying how competent and wonderful and special she is but they don't show it. Jack seemed to have lost most of his characterisation and become a caricature. The new characters don't do much to make me be able to realise they were the same characters from scene to scene and they weren't very interesting. The main plot device seemed to be an excuse to see how gory they could be, and there seemed to be no depth to the story. It doesn't seem to work within the Doctor Who universe at all - although maybe they could have done something about that later on.

Basically if it was a random show that I'd tuned in to try I would not watch more of it... given that it is Torchwood I might try watching more.