I added a few white roses for contrast. Although this bride loved pink, I wanted to give a little break to the eye. Keep in mind that monochromatic (all one color) bouquets should have different textures or elements to add more interest to the bouquet.
Here you can see where I added more peonies on the sides and below the first peony.
Fill in as you go. It is wise to create "flower formulas" for each bouquet and centerpiece when you order flowers. You then refer to them when you create your bouquets. This assures you that you'll have plenty of flowers to finish all designs without running out.
Otherwise it's tempting to add more and more flowers, and then be dismayed if you don't have enough to finish that last bridesmaid bouquet in the end!
Don't feel it's necessary to pack the flowers too tightly unless that is the look you are trying to achieve. I want the greenery loops and beaded wire to show and draw the eye.