Unlike poprush, starvation has never carried any temporary morale penalty, atleast not that I'm aware of. I assume they left this out for good reason. It would definitely make occupying a large enemy city problematic. This could be solved by giving the player more tools to deal with starvation, but that is another discussion entirely.

Historically starvation has been a huge source of social unrest. Just consider the French or Russian Revolutions. Maybe this should be included in the game.

Maybe, but starving the pop of a large city you have just captured is about the best way for a warmonger to deal with those nasty insurgence. Ok if we are given other means of persuasion, labor camps maybe?