It seems to need cropping, but I'm loathe to get rid of the chap in the suit bottom left.
In my opinion, that chap is actually ruining part of the photograph. The reasons are semi-technical:
1) There's something wrong with the geometry, he looks stretched as if in a funny mirror.
2) There's too much picture noise, so he looks artificially placed.
This detracts from the image just by distracting.
The lighting is what really grabs me, along with all the people going about their business, all the stories they must have.
Yes, but you could probably increase the contrast a bit; the colours seem slightly washed out.
I've tried a tighter crop to increase the feeling of a busy square, while keeping the geometric elements in there. Since I thought the stairs on the right also detracted from the geometrically clean feel of the image, I cropped them out, too. I tried increasing the contrast a bit, but since I'm not currently at a calibrated monitor, I'm uncertain whether I pulled it too far or not.
Notice how there's another guy in a suit that suddenly stands out a bit more?
It's only a suggestion, though. You'll probably find a solution that works better for you.
BTW, try converting to black-and-white with the channel mixer and see if that pushes some buttons with you.