(This was going to be a comment, but I ran over 1000 characters).

I noticed some weird stuff with AI empires running some of these origins, so I decided to spend an afternoon testing this mod.

1st issue is that when an habitable mega from this mod is colonized (with exception of Shellworld) or started via origin, the basic City district isn't present at start. Wait a month, and the basic city district will appear, but with whatever your baseline capital building is, like a reassembled colony ship shelter. But if you/the AI managed to build ANY district, that district will then replace the basic city. Problem is, the AI might first build a resource district, which then destroys the capital building, and they aren't smart enough to then build a city segment next to have it replace the resource district. So I've seen empires with massive claimed systems, but almost nothing for pops or capital planet build-up.
-side note, this also affects the Company. Except they seemed to have no jobs at all, and no option to build any sort of city district. This was discovered via Observer mode, so this may be intentional.

2nd issue, on some origins like Stellar hoop and Habitable Gas Shell, I'd have a CTD before it could add any sort of city district. On a reload attempt, it'd then resolve and not crash, and add the city district.

3rd, some of the habitables have screwy job numbers. When a mixed industry on a specialty segment has TWICE the total jobs of a specialized foundry or consumer goods specialization, that's silly. for the record, this is Edersphere, Discworld, and Freefall sphere.

4th, some habitables have resource districts that provide no jobs until you make the specialization. Examples are Blackhole Supra's matter decompresser and Stellar hoops mineral and energy districts.
-side note, the Blackhole Supra's matter decomp specialization implies it offers cultrobium jobs? no idea why that's there, the specialization provides the only mineral/dark matter jobs.

5th, minor issue. Blackhole Supra's Surviellance district does literally nothing. No jobs, no specialization. Nothing.
6th, minor. Gas Giant Shell's planet feature has no effect at all.
7th, Edersphere origin has 3 blockers that provide 1 scrap miner job each. That's 1, not 100 each. So in 4.0, basically useless for resources.