Occlusion: Too much, yes! But more important they thought about how light works. More or less. And even if the effect is a bit too strong, i really like that the corners of the walls are darkened. I’m not sure how they did this, because the occlusion shadow looks very straight. Maybe a light map? But maybe they used vertex color? I have no idea.
Because of Deus Ex impressed me a lot with this occlusion stuff (besides of the great gameplay & story), i forgive the new “Deus Ex: Human Revolution” that they overuse the occlusion again. I see it as there style:
Oh and don’t forget to read this small comment about exactly this issue.