What exactly happened between Eureka and Renton in the end? Initially I thought they fused together and became a new control cluster. But I'm not so sure after I thought about it for a while. After the scub coral "reach enlightenment" and leave the planet is there still a need for a control cluster on earth? Is there sill a fear of reaching the limit of questions?

Also is desperation disease really just humans who have fused with scub coral? This explains why we see those people wake up at the same time the control cluster is destroyed. It would also explain how they seem to know exactly what's going on.

And finally, why doesn't Adroc speak or acknowledge Renton when they first meet. His sister seems to have retained some of her humanity but it feels like Adroc was lobotomized

There's still a ton of other stuff I don't understand but these are my most important questions. I gotta give the show props for being confusing and complex without ever making me feel truly lost