This is the resulting histogram after
I closed the file and then re-opened it
so it wouldn't show white lines relative
to original image.

You see the blacks now are there in small
amounts. The grays still predominate
and there's not TOO much white.

In the final picture, the building surfaces
and faces should be less flat and have a bit
more punch.

If the blues are too vivid now, that's
because increasing contrast will ALSO increase
color. You can desaturate some then.

Hope that helps!