Documents from the chapters meeting
On a basic level I see the chapters as another way for people to connect with each other and they provide alternative methods of communication for users. So, I see it as a way to address some issues related to community health. It also could be a vehicle for WMF volunteers in various wikis to organize in order to better collaborate across wiki or with outside organizations.
I agree with this. I think outreach in general -- both internally and externally -- is a great role for Chapters to play. The German Wikimedia Chapter gave birth to the idea of Wikipedia Academies, and they could play a great role in distributing swag as well.
I guess I'm still not clear on what it is that Chapters do. My understanding is that they were just meet-ups for active volunteers. I wasn't aware that they had more/different responsibilities than the rest of us online folks.