Your practice boxes look pretty good..... photo's always have a little mis-representaion on true color, and sauce tends to have some glare, I won't consider those factors in my comments. For appearance scoring, I like to stay in the 15 second judging window, then I go back for a second look before making comments.
Chicken: Overlooking the torn skin you mentioned, the size and trim looks good. The box is balanced and the bed looks nice. The sauce looks too thick to me, and a little uneven. I'd give it a 7.
Shoulder: I like the layout of the box, as well as the size and contrast in color of the chunks. The bed shows off the meat well, if anything it's a tad roomy in front. The pulled meat looks nice and moist, but the pile should be fuller, maybe with a slightly finer pull. (a fuller pile would also move those chunks a little closer to the front of the box too). I think a mix of Miss white and Mr Brown would show off the pulled meat better, and give it some contrast.... I wouldn't score appearance down for no visible sauce on the pulled meat, but you should have some sauce or drippings out of view so you don't get hit on taste. I would score this box a 7-8.
Ribs: I think the side view ribs look a little dry and are smudged. (in the 15 minutes before the judges see them, they might look drier yet). The cuts are not as clean as they could be. The bed needs to be tighter. I like the pull back that I can see (did #3 and #4 have pull back or is hidden in the parsley?), and I like the color and viscosity of the sauce, but some of the specs are a bit large. As is, I would score this box 6-7, but with all other things staying the same, 2 more ribs with a 4 on 4 arrangement would be a solid 7. And might even push the score to a 8.