Idea: Steampunk vs. Frontier?

Not sure what genre this would be in, but I'll stick it in steampunk, although it's not very Victorian. Some bits of it are actually a little cyberpunk-ish, too, with the anarchy going on.


( Summary )

( The Subway People )

( Free )

( Sam )

( Sarah )

( The Frontier )

( Plot & Themes )

I think this will make a pretty decent story, a novella at least. What do you guys think? Would this actually be worth reading, and thus, writing? Or should I shelve it for now?