Tried to send you feedback report, but error occured. I ran into problem,
I got 2 147 483 648 people living in one city (thats right, it's 2 147mil people) after 70 years and it impossible to build anything around that city or send transport of good into that city without too high operation/transport cost. and the FPS dropped so bad.
Maybe reduce the grow rate a bit? I mean even largest city in the world only have 33mil people after 200 years after industrial revolution.