Hi @gsilvapt!
Sorry for your experience so far. For the last month we have been working on the community roadmap, and we were not able to answer any new requests from the network, I should have answered your email (that was forward to me), but I decided to wait until we will have a concrete plan about working groups. You are right, some working groups are non active, and we need to think of a sustainable way to keep them alive and kicking. We try to come up with ideas in the roadmap, and I think we are going on the right path.
You can find more about the network plans in the OK blog here - Open Knowledge Network and Community Updates - first steps of 2016! - #3 by pietercolpaert
In addition, we will hopefully publish our new Network guidelines on Thursday for comments, so I think it will be great if you can comment there as well.
Let me know if you have any questions!