I'd leave a little more slack around the edges so the picture frame doesn't cut off any heads or important parts of pictures, esp lower left. The center picture should be cropped wider (or tighter) to get (or eliminate) the yelling mouth in the top right into a full face. Maybe use a more fun font for the Thank ......, unless the font used for the Ashburn ..... is the official club logo. I agree with the font not standing out. I'm not fond of the balance of the logo on the left vs the picture on the right, looks uneven to me. Not sure what you can put there, soccer ball, trophy, or split the label and logo to opposite sides, change the proportion of the picture to match the logo.
Fun idea, 12 x 8 is just big enough that its displayable.