Torchwood in old days always left mixed feelings. The plot was original, the atmosphere often very nice and the acting was plainly bad right from the beginning. Bearable for science-fiction enthusiast but definitely beyond average compared to what a drama series would be able to offer. And then they launched "children of the Earth" and that was the best piece of science fiction entertainment I have ever seen.
And compared to this television benchmark the new series is plainly a disaster. Superficial characters, huge holes and logical flaws in the plot and the whole thing is so very very slow. You can really feel in any minute you are forced to watch this, that initially the whole thing was planned to be a mini-series and now is stretched beyond limits.
Bottom line: compared to "children's of the earth" the whole this is a disgrace.