From what I played, 6/10 is exactly what I'd give it.
There are a few moments of genuine brilliance in the game that hark back to the original series (Chapter 5 in particular), but for the most part the game is hamstrung by awful design decisions ranging from linear, constrained levels, to uninspired, laughably bad storytelling and braindead AI. It's just incredibly mediocre and an insult to fans of the original series.
Dishonored is far superior to this in every way imaginable, despite not being an actual Thief game.
There are a few moments of genuine brilliance in the game that hark back to the original series (Chapter 5 in particular), but for the most part the game is hamstrung by awful design decisions ranging from linear, constrained levels, to uninspired, laughably bad storytelling and braindead AI. It's just incredibly mediocre and an insult to fans of the original series.
Dishonored is far superior to this in every way imaginable, despite not being an actual Thief game.