These aren't bugs, these are two things I don't particularly care for gameplay wise.
1) Planet specialization. It already exists in the game. It was called building your factories, your research centers, etc...
I really don't think this adds much to the game outside of an extra layer of micromanagement. Also, in the early game, that +9 is insanely powerful. Overall, I think the specialization is a layer of micro that isn't necessary.
2) Farms due to the population change have become underpowered. Perhaps if they added a population growth effect, as more food= healthier people?