Many posters complained that it was about RNG, but it really is not, in the same way that Kovarex enrichment isn't. Sure, obtaining individual pieces of U235 or higher quality items is indeed based on chance, but integrated over a long time, it boils down to just scaling the recycling capacity in the same way Kovarex works. While having large cells for high-quality items will be fun to build from what you've shown so far, I think you could have instead come up with more complex, interesting, and productive recipes for the same products, maybe using a few new resources too to justify the increased efficiency (in a similar way to how oil processing progresses). That way, we could still achieve horizontal and vertical progression in a more creative way.
Instead, what if going to space with the new expansion would unlock new materials that could be sent back to Navius to be used not only in new space-related items but also in new recipes for more efficient production of old resources? That would be both horizontal and vertical progression as well.
And lastly, I agree that the named for the quality tiers absolutely should be changed from generic "epic", "legendary", etc
