Chicken looks a bit oversauced and the front two pieces seem to hang over the front edge of the box. Lettuce doesn't look too bad but try and bring it up the sides of the box more.
Ribs look good, but again bring the lettuce up the sides of the box. Also on the lettuce make it even all around the box. Don't have some hanging over the edge and some just to the edge or not to the edge at all.
Pork, just even up the lettuce in the box. I personally think the bark looks fine. The meat does look a little dry though.
Brisket, the slices are too thick. As mentioned above, only cut them about a pencils width. Also lay them in the box more evenly.