Do you think this game would be better with a perspective over the shoulder?
It's not simply 3rd person, you can keep aiming nearly as good as in a 1st person perspective, which is needed for a game like this, IMHO.
It's not 1st person and you can see where is the character, which is quite convenient for a stealth game with platforming elements.
I think it could be the best perspective for a game like this, basically it's a compromise solution considering all the elements involved in the game. I'm always puzzled about the combination of platforming elements in a 1st person perspective, despite of having seen then in other games previously like Turok or Mirror's edge.