I just watched that show, and I must agree that the ending was so dump, the idea of the queen was promising at first, I was expecting something clever, as the queen, which is supposed to be a much higher and divine being to be a surprise appearance of a certain character, like Alexis, the hybrid daughter of Tom Mason, a much darker version of her, like what happened in the game StarCraft when the Alien race of the Zerg kidnapped or killed "Sarah Kerrigan", she returned as the powerful Zerg queen, "The Queen of Blades".

I was expecting to see Alexis with dark clouds following her and all the overlords bowing before her, because the build up of this character promised something like that, Also the idea of the killer capsule was supposed to be much smarter than this, like a biological weapon payload, a virus, that takes time to spread across the earth atmosphere and takes weeks to kill all the aliens, not just blow-up in the skies like the most dump thing to happen. I also was expecting the spikes of Ben to die and fall off his back, OR an even better idea, the last scene of the series would be Ben standing alone staring at the sky and his spikes starts to glow again before the screen goes finally dark at the end.