For starters, as has been noted, it's less genetically diverse and less innovative

I don't think these are the sorts of negative characteristics Geneva was talking about. These are (arguably) negative effects of removing what are defined as negative characteristics (male aggression, and the tendency towards hierarchy, for example)

I don't think 'equal' is a particularly useful word to think of the society with

Even though there are no ranks, no permanent professions, no centralised governance, and no personalities that do not in some way contribute to a wider whole? Um.