Sorry, but this still doesn't resemble a shuttle. The shape is still a rectangle. You have an ugly payload pay with a half-assed nose and a almost non-existent tail fin. Despite it being top mounted, your payload to mass ratio is horrendous. Take some time planning out a shape, you can make the payload bay out of an interstage so it's not so ugly, make the tail fin bigger. Bonus credit if it flies side-by-side with the booster. It's supposed to look nice