This is a nice shot, but the subjects don't really 'pop.' This is most likely due to the high aperture - it is most likely at f11 or higher from looking at this shot. Perhaps even f22.
If you were to take this shot and you want it to pop a bit more, you could do two things.
#1) Use a lower aperture - perhaps 4.0-5.6. In that range, you will still be able to tell what is in the background just fine; however, they will be slightly out of focus. Thus, it will bring the attention to the bride and groom.
#2) Use off-camera flash!! If you had a small off-camera flash synced to your camera at the botton of the image just giving a touch of fill flash on the bride and groom, it'd make all the difference! You could then expose for the background, adjust the exposure 1/2 stop lower, up the fill flash to fill the bride & groom properly, and then take the photograph. This would result in a very rich and vibrant image with the bride & groom definitely the main subjects but also have the background look just fine as well.
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