Maybe you know about these problems but I haven't seen anyone write about them so I will point them out. It seems to me that the citizen automation button in the city screen does not work properly. It simply doesn't choose the best possible option and is often choosing differently when you switch through different options and back again (hammers, science, GP, etc.). Having to do this manually in every city would just be too much of a pain in the neck. Double clicking on a stack sometimes does not select all of the units.