First of all, this image is way too big even though you are providing the bandwidth to display it. There are guidelines for uploading images to the Nikonians servers and I would suggest you read them and reconsider the size of this. Having to scroll to view a panorama spoils the impact of it, IMHO.
The composition is OK but other than the nice puffy clouds, it lacks drama and a central focal point. Yes, the river attracts the eye, but it really is not enough to distinguish it from any other pano of a cityscape. Try shooting at dusk or dawn for something more, or recompose so that the horizon does not run right through the middle of the frame. I would also crop the guard rail on the right side, it doesn't add anything to the composition and actually is a distraction.
Thanks for sharing this with us. Where is this, BTW?