I am not sure yet how we are going to do things in regards to the website. Once we decide on that, yes, we can do that - have a single repository named open-economics and divide every project within that repository (not sure if I like that organization, but I understand and respect your point). Worst case scenario, we create a repository for each project as you have been doing with other groups and projects. Keeping things consistent also makes sense 
Yes, I have seen the network guidelines. Excellent work! However I am not sure if working groups are that well covered. My point was expressed here, in case you haven’t had the chance to have a look on. From there, there is a lot we can speed up and, of course, get in touch with the community managers to solve underlying topics.
Thanks, once more!