Stitchpunk: A subgenre of Steampunk. "Fiction influenced by the DIY and crafts element of Steampunk, with a prime example being Shane Acker's 9, in which cute Frankenstein doll-creatures stitched together from bits of burlap sack try to save the world. In a wider context, Stitchpunk emphasizes the role of weavers, tinkers, and darners in Steampunk." Termed by Acker and outlined as such officially in The Steampunk Bible (page 55). More details and examples may be found here.
What Could Have Been: Looking at the deleted scenes, the key around 6's neck would have been more important to the plot, with 8 playing keep away with it, and the survivors using it at the end to open a box the scientist was holding. Inside is a mirror, and a note labelled "hope" as the survivors look at their reflections.