Synthetic Ascension overall is just terrible in this patch and needs to be adressed. Here is some info copied from reddit user MarcoXerox:
"
Upkeep for free pops is substantial (1.25F + 0.25CG + 1 Amenity + 1 Housing / worker)
- Enslaved synths (additional +10% production from tech, w/ Flesh is Weak to prevent AI rebellion plus other buffs) or droids (+5% from efficient processors) are the best pops in game. ($1 + 1 Amenity + 0.5 Housing / specialist) Plus they have no PP or happiness unlike slaves, which means high stability and high resource output. Taking synthetic evolution ironically downgrades their usefulness as upkeep is substantially higher. In fact, droids are preferable to enslaved synths, and IMO the synthetic path is somewhat weak.
- Slaves are the next best pops in game. (1.25F + 0.05CG + 0.75 Amenity)
- Even at low habitability slaves are still pretty good as increase in CG upkeep is minimal. I find sending some slaves to low habitability worlds where their growth will be limited quite useful as it allows for more pops of primary species. Plus less xenos = less xenophile attraction.
- Domestic servants (0.75 Housing) are never unemployed, can become entertainers (which is specialist), and provide amenities when they are idle. Great for ecumenopolises or habitats.
- Livestock (0.25 Housing) are great for building slots, and by extension habitats. In fact with livestock 6 districts is enough for housing everyone and it saves you from adopting Master Builders AP. "
Having a big part of your population suddenly requiring twice the house is a huge blow to your economy. Furthermore food jobs should switch over to technician jobs like in the old version and energy gain per job has to be raised to be equal to food.
Engineering tech is incredibly scarce and the projects to robomod your entire species take up too much engineering research. But Engineering research is the most important as it unlocks techs like mega engineering but even more importantly starbase upgrades which are mandatory for your survival.
Pop growth is strong on highest level capital building, however Robots and Synths need to be able to migrate automatically. Having a 50+ planet game with half of them being maxed out on pops, the game turns into resettlement simulator. I am using a mod for automated migration via a planet decision but this should simply be an option for everyone and not a quality of life that needs a mod.
Also the planetary "decision" to turn off drone production on a full planet is completely useless. Its a waste of 25 energy and pops working roboticists jobs. You can simply disable roboticists jobs for free, get those pops work on something else and achieve the same.
These "bio reactors" which convert food to energy should not be taken seriously. This is just a huge band-aid and not worth a building slot.