Almost 20.000 people in my city were killed in a VERY short time and we are still struggling to feed our realm. And since we never had great problems with starvation I was a bit suprised at the changes.
Your city didn't lose those people due to the rebalance but due to starvation. And as you could have noticed, it's happened all around the continent. For example, Luria Nova held on to Port Nebel with it going from 30k pop to 1.5k pop. And in the meantime, Giask started starving and revolted. Look at Gelene, look at Libidizzed, look at Chrisantalys. Starved. Rogue. So maybe don't complain so much but welcome the rebalance that brought more food to Dwilight?
