A healthy active community > valuable content > something to offer/other parties come on board > a healthy active community > …
I don’t think this is limited to classical music, but any way to make editing more responsive and rewarding (which working in a team intrinsically is) will have immediate benefits. Starting with classical devotees I think is an excellent idea.
I don’t know if it would even be that much work, beyond perhaps a leader to make a thread and keep discussion going, and eventually some custom badges/rewards from @quora
Having members of this team subscribe to and help new editors become familiar with classical guidelines (or just post ‘thanks’), and then come on board, would produce immediate results I think.
Maybe the next meeting can focus on action points…