Is it my imagination, or are pests MUCH more of a problem in V31? Early Ancient and I have 10 unhappy due to pests per city over size 6! This makes it almost impossibly to keep the people happy, and pests have no means to address them at all (so far as I can tell). Is the intention that they are totally unaddressible yet have a LARGE (the single largest I think) negative effect on a city (unhappiness mostly, disease effects to a lesser extent)?