This is way too overexposed; the light flareouts are painful rather than pleasing, and the light grey featureless sky does nothing. A long exposure could work here, but you need a much smaller aperture to ensure less light gets in - try underexposing by half a stop or so. Also, cropt out a lot of the sky because it adds nothing (unless you get some features in it).
Well, where do I start. Looks like this really had the potential be be a nice shot. You chose a beautiful skyline to work with. But...it is overexposed, and blurry. Not knowing what your camera settings were other than a 30" shutter I cannot say what you should do to fix the exposure. But, if you were not using the largest aperature setting, i.e. ~29, that would be a start. As for the focus, if you were not using a tripod or another stable surface, try that next time. Correcting those two things would improve this pic 100 fold.
I think you have the makings of a fine photo here. The main problem (IMHO) is that it's over exposed. Maybe a lower ISO and/or smaller aperture would have helped, or possibly a neutral density filter. The reflections would then be visible (one of the photos strongest elements.) If it were me I would crop the bottom 10% of the image losing the dark line. Sorry to sound negative. Just my opinion.
Contact me, I know this spot and would love to help you capture what you are looking for here. The only problem with this is the over exposure, maybe shot at f22 would have made it better. Love the location though just look at my profile.
Don“t know what to tell you but this shot is overexposed, severely and the result is not aesthetically pleasing, nice try though, try a lower iso, smaller aperture or an ND filter next time.