Not sure exactly what your expectations are but for the equipment and scene that looks like a reasonably accurate photo.
If you want a more lit downtown type photo I think the subject matter is wrong ... needs a more lit up scene (that is, more ambient light versus the point light sources). Your photo seems reasonably sharp (look a very small light spots ... they are somewhat blown but not "very" blurred). If you want the overall scene to be lighter you have to expose longer but as I'm sure you know this will really blow out all your point light sources or highlights even more.
If you're determined to use that particular scene why not try two, or more, photos at different exposures and try to make a composite in an image processing program???