Meh...
Having few all round-general communities that are rewarding; and bunch of non-rewarding or low-rewarding(compared to these general communities) is basically the same thing as we had before the communities. :)

Majority of posts are being written in general topics, instead of narrowly specified topics... So, social aspect as well as engagement is still way off; when people start posting (or curating) in other communities that will be interesting effect.
So far we have founders and maybe a person or two writing in small communities; and everyone else writing in these 10.

Anyways, just my two cents. :)