Not necessarily, though I'm quite sure how you guys are organized and what your vision is. Knowing your vision for VYB would help with coming up with suggestions.
I'd say at this point subcommunities are unnecessary. I'd espect a challenge that first explains a core principal of what VYB is about then goes into a challenge that follows it. So of course there needs to be rules. Rules are part of the culture. Even anarchy has rules.
So, first we need to know what VYB is, what sets it apart or will, the vision then a way to start the VYB culture. Right now it's up to the founders to pull everyone together into a VYB Comminity. It's a Hive Tribe, but not yet, so already a subcommunity.