1-background isn't fabulous. Because of the light I probably would have shot from reverse direction or from the side (perhaps as silhouette). What is your subject ? If it's the ladies, expose for them properly (they're underexposed). If it's the ground behind them, then expose as you did.
2-Again, exposure seems set as to not disturb the background--but the subject has to be the bride. I also see a kind of discomfort in her eyes. More playful interaction would help in these situations, though I acknowledge it can be one of the hardest things to do in wedding photography.
3-Your exposure shows huge concern for the background and whites of the dress. Your primary concern when choosing an exposure / editing should be the brides face (in this shot at least). If you were set on shooting ambient, and set on this orientation with respect to the sun, you needed to up the exposure. On the other hand, the shot is exposed brilliantly IFF you also popped some flash as well--preferably off-camera flash with an umbrella to light the bride up.