The story ending was nice, although we haven't resolved the Nibirun yet and surely we must be getting their pretty golden scenery before this ends, so I expect we'll get that in rank 8.
I had wondered if there might be a plot twist and the "Omicron home world" section of Elysion might turn out to be the Nekropolis after all, but I like the direction they went with calling up a whole forest of those trees.
It feels a bit off that the Grebuloffs are cutesy otter-people. Given their backstory of starting out as aquatic and moving onto land, I was expecting that they were fish-people and the "diving suits" were actually the opposite; a water-filled suit so they can breathe on land.
Also, I wish there was a bit more water in their part of Elysion – a really nice wide beach and swimmable water under that starry sky would have been lovely. The zone seems to have been built mainly with gathering in mind, but it could have been a spearfishing spot.
Staring at the glowing ball in the heart of Elysion, I have to wonder – the default science-minded assumption is "it's a star" – an actual star, a sun, not a planet – but then perhaps that isn't right in this setting. A planet's crust is coalescing around it. Could it actually be the planet's aetherial sea?
Also I wonder if there was some intent to imply the Omicrons were originally Earth humans, given the specific nod to Omega/M-017 in-universe deriving its name from M17 in the real-world Messier astronomical catalogue. Then again, it's entirely possible that the "real" catalogue got invented by a fictional race in the same way that anything else recognisable in the story-world has to have a fictional history.
Still, that sent me wondering if N-7000 is also an astronomical reference for naming purposes or just a number the writers pulled out of nowhere, so I consulted Wikipedia and the NGC catalogue does go up that high, but it turns out to be the somewhat boring and definitely not lore-friendly North America nebula. It's in the constellation Cygnus though. We could nickname N-7000 "Cygnus". Sigma? Kind of funny because just yesterday I was thinking that "gawky space robot addressing someone as Sir" put me in mind of Sigmund from Ratchet & Clank. I liked him. I'm wandering a mile off course now but I need to play those games again sometime.
Omicron design is extremely gawky though, and not in an endearing way. Everything about their stance and proportions looks off.
Also, as with Omega, having a character using "it" pronouns just messes with my mind (and more importantly grammar) in a weird way. People aren't meant to be "its", and "it" is used as a placeholder for the non-person thing in a sentence.