Well, it was a cute little romp, but it was basically "Giant Spider Invasion" without Mike and the 'bots providing entertaining commentary. I'm not necessarily opposed to fluffy fun for fun's sake. I just generally prefer a bit more thematic meat in stories.
I feel like I never connected with this story for a couple of reasons. First, the main character is desperately passive. I think he shoots his gun once, maybe twice, and never to much great effect, and the climax is resolved because "by a miracle" the tram cart "landed just right" and no one got hurt despite the odds strongly suggesting that they would. Second, the heroic sisters are too many to keep track of in such a short story, and their characterizations are one-note at best. (There's the cranky one, the friendly one, and a handful of vague nonentities.) This is simply, I think, an artifact of the length. There are ten to fifteen characters in this story, at least eight of whom have significant roles, and not even a literary genius could fit more than a skeletal character outline for each of them into a short story.
The monsters were just monsters without much purpose or thematic heft, and not even any chilling implications to speak of. They arrived from an unknown place for unknown reasons and proceeded to wreak generic mayhem until vaguely differentiated heroes kill them without excessive difficulty. There was a moment of "Oh, how beautiful" with the queen, but without any sort of thematic underpinning, it just kind of falls flat. It felt like we were aiming for that bit in "Alien" where the android babbles about how perfect the monster is, but that movie's horror comes not from the bizarre and incomprehensible beast, but from the revelation that the crew was purposely sacrificed to retrieve the creature, and thus that speech is both eerie and significant. The heroes are likewise without much structure; they kill monsters because they were trained to do so from birth, and there's no real examination of the role of women in early American society or the significance of their prowess in traditionally masculine roles. Likewise, they flash a whole bunch of technology that seems to just be imported directly from the Batcave, yet society doesn't seem to be impacted at all by their advanced weaponry and personal flying machines.
I know it's just a popcorn story. It's probably a flaw of mine that I can't turn off my brain and just enjoy silly adventures without taking them apart and looking for the underlying mechanisms. I need to have something I can grasp on, either a really good bit of characterization, a thematically interesting threat, or an intriguing examination of something in the setting. This story wasn't interested in that, really, because it was about Kick-Ass Grrlz Blowing Up Spider Aliens. I'm sure that the author was quite happy with this story and that it did what it was intended to do; it's just not for me, apparently.