As far as I can tell, this can't happen until there's someone with an authority to take the community management upon themselves. Otherwise, most of the initiatives like that are doomed to lose steam and be gradually abandoned by the community. Moreover, while "coordination and management" and "non-bossy way" aren't direct contradictions, combining them is a really hard problem.
The demand for something like you describe is definitely there, as you can judge by the regularity requests of this kind appear. One example is my thread (which is now 3 years old): [Improving the documentation: Roadmap, community engagement.](https://forum.nim-lang.org/t/8091#51806) Unfortunately, the core development team is permanently overburdened and understaffed (prove me wrong), and in conjunction with a view that community is managing itself well enough, this area of possible development falls far down their priority list. At least we got a couple of Nim roadmaps out of all the talking, that's great (speaking without any irony).
