I think when you submit a design, the close-up view should appear, but there should be a option to view the mock-up view so you can see what the design looks like on a actual t-shirt. I cant imagine it being that hard to add, but not sure.
Also, I know when you submit a design it tells you to add the mock-up shirt, but you cant actually view it when at the rate tees section which is what Im trying to see if we can make happen.