I found this RPS article an enlightening read:
http://www.rockpapershotgun.com/2013...3-playthrough/
It seems they have kept certain elements of Thief, but added it a lot of stuff to try to appeal to modern audiences.
I'm not sure it's going to work really, and I'd probably suggest playing Dishonored instead, which was Thief-like in many ways, and is generally very good.