IOI always had a problem with this. The people in their games never looked natural, for instance. It doesn't matter how good the game looks graphically, something always feels off about people. They give off a kind of wax sculpture feel. Then there's the fact that their levels are kind of perfectly structured, because they're basically puzzles. Which makes them feel artificial. It seems like they're using a similar approach here.
Also, it doesn't help that Bond looks like young Tom Cruise. What the hell?
But there's also the overarching "vibe". Maybe that's what you're referring to. The same kind of vibe that's present in every Hitman game and in Kane & Lynch. There's a unique, almost signature atmosphere to their games that isn't something that can be put into words. It's similar to how you can always tell a Guy Ritchie or a Tim Burton movie etc.