Going through the new one now. It's not terrible to be honest. I can see the complaints though.
Yeah, there are quite a few "wtf were they thinking?!" design decisions in there, but overall it was Thief-y enough for me. Moving around as Garrett felt as good as it needed to, so that's a major thing they got right. Level design has got to be the weakest aspect of the game, though. I mean, most of the side-job levels were more fun to play than the main story ones and the Bank Job DLC level was by far the best one out of the entire game.