Quote Originally Posted by MFauli
And I really like Squealer. At least one "person" in this anime thatīs smart, clever and ambitious. Itīs quite clear to me that queerrats are one of the degenerate past human tribes. And theyīre about to cause an upset.
I think they've evolved rats. Cantus users are changing their environment and creating new species. The False Minashiro was supposed to be a sea cucumber or something. It seems as if there are no degenerate humans to be seen thus far. They're all either dead, or Cantus users.

The theory is supported here by how the two main clans (Robber Frly, Giant Hornet) are also the most human, seemingly due to their higher exposure/interaction with Cantus-humans.

Quote Originally Posted by MFauli
Though Iīm not following the above discussion. Saki wasnīt worried about the queerrats using a cantus user ... she was worried about them using cantus-users in the same way they use their queen. Or am I over-analysing this? It kinda sounded to me as if Saki was worried the queerrats would breed their own cantus-users ...
Saki is worried that queerats would revolt against humans (their superiors) when they have the means to do so. If humans were deemed necessary to the queerats' survival somehow (let's say... they need bioenergy - to borrow from The Matrix), then humans would be kept alive to the extent of serving that purpose only.

I was amazed at words like "concrete", "diplomacy" and "encephalitis" to come from Squealer's mouth. It really shows how far they've come (and how far they can go / how dangerous they can become).