The game definitely starts to chug earlier than before. I’m getting stuttering around 2260, well before earlier builds. Not unplayable, but worried how it will do in another 100-200 years.
As far as micromanagement - it actually isn’t too bad since you mostly can ignore the planets until a new pop grows that is beyond what you can support already, at which point you make a decision. And, better than before is the decision feels somewhat interesting/strategic, rather than just an obvious tile usage or click to upgrade as before.