Below is the "before" grid. I started by dropping in a bunch of images, and then I analyzed what was fitting and what wasn't. I removed the upper left drawing, the center wedding invitation and the pansies illustration because they didn't feel like they had the same look and feel as the signature style coming through in the other images. Then I played with arrangement, color, and cropping to create a more balanced feel.

 

Here is the final, styled grid: