Personally I think it'd be nice to have at least a small community area in each district. It makes sense to have most of it around the hub, but maybe we shouldn't make that exclusive.
I wondered whether we might need some 'recreationnal' areas for games or leisure, but I guess it falls under the 'community' areas. Which is also why I think it would be nice to distribute geographically a bit more the community areas.. Maybe we could just flip a couple of the commercial shells in each district with a couple of the community shells? Just an idea. On the other hand we have all the courtyards which will act as natural gathring places/community areas.. Don't know.
Also I agree we need some 'unrestricteda areas' -- or would that fall under the Residential areas where people can basically do whatever they want?