I really like the composition here and overall I think its a great job. I would have probably cropped a bit more on the left side. The end of the dress is lost, that would have been nice to see but since it is not there I would have opted to crop it a bit closer on the left side. Just a bit more room on the right side would, I think, have given us just a bit more impact. Having the couple give a bit more of a turn toward the camera, so more of the bride's face was visible might have also added something special, like catching the corner of a soft or tentative smile maybe. The red really stands out here. I see that the background has its flaws but a bit more luminance in your yellows would have helped there I think. Also could have isolated the couple and and toned down the browns/reds in the background only, just a little bit to make the couple pop just a bit more. Opening up the shadows in the groom's clothes might also have helped push the couple out a bit more. Still it's a very nice shot. Hope they got a print, its a nice moment for them. By the way I hate the star rating system, I don't think its a good gauge for any of these points.