Her dress need something to bring it out.
If a dress will be very plain, then its shape is everything. The top of this gown looks like an ordinary V-neck T-shirt - and an undershirt at that! From the waist up, the bride looks like she'll be going for a jog. And there's a giant seam running straight down the middle. What a difference a ballerina neckline would've made to make this plain dress look feminine and graceful and it would've showcased her very pretty face.
Here's a gown worn by a Romanian royal bride this week. It, too, would be plain without the embroidery at the neck and cuffs. Yet, because of its shape, it is many times prettier and more elegant than the dress of the Alba bride.