Actually, I was considering your comments when I was walking through, trying to get a feel for it.
And actually, when on the sidewalk, I was not left with the impression of it being tight or claustrophobic as such. I think the fact that some of the features slope back as height increases eases that closed-in feeling. I was left with the impression that this will be a nice addition when finished.
I did notice that all the glass has a bluish hue to it (exaggerated by the rare blue-sky reflection), whereas in the rendering it seemed to take on a copper hue...
I'm assuming it was a conscious design change for some reason?