I don't think the original was 'bad' - just flawed. I think the position of the couple and the emphasis on that long train was a good idea, but yes - the background kind of kills it. Everything else seems to be there - the exposure looks fine, the tones are good (the train of the dress being a tad too bright maybe), the position of the couple relative to each other and the camera. With shots like these that are unplanned, though, you have to remember to take the background into consideration as well and realize that everything else might be how you want it, but the shot still isn't there. This will get easier with more practice. It's hard to think about so many elements at the same time while trying to be fast enough to get the shot, but after a while, some of these elements will become much more automatic and natural.