What are these people doing? Reading a book and text messaging when they have such gorgeous scenery? Must be locals. Now if they were smooching in this romantic location, that would have really made the scene! Of course, it would have been rude of you to ask them to do that for your pic. I'm not being realistic about that.
One nitpick. I think a little more sharpening would have helped this pop a bit more.
If this were sharper instead of the soft focus used, it would be outstanding. The clever use of light and shadow against the backdrop demonstrates the nature of one of the world's most beautiful cities. Straight forward font with a subtle color works very well with this. Almost perfect.