Right now there is no place where team members can collectively create flows and share at one place. If given the option to share the Folders among different members just like we have for flows it will be lot easier. For Example: If there is a folder with 4 different flows, and I share the folder with my team mates they can edit and created new flows over there and can see all the 4 different flows already present. But if out of 4 flows if I share 2 flows with someone, they see the folder but they don't see the flows not shared with them.