Thanks for the very analytical feedback, Maggot.
Most the lines I laid were connecting the original lines, so the facets are all hidden faces already in the Lamborghini Language. The key line that I put down is the one sloping downwards from the top edge of the door, it echoes the straight slanting roof line and also define the black area near the cabin, what it does in my eye is make the tail biased proportion even more pronounced.