Yeah, the best way to run a "larger community" in my eyes is to give all involved regiments their own form of indepence. They can play how they wish to play and run their own line how they wish to. High command of the said community would only interfere if the regiment in question would break community guidelines or event rules.
A lot of big communities did use to have an active chain of command in-game, as in giving orders to different brigades/regiments and focussing their troops in a specific area of the map. These brigade events were pretty fun, but as time went on and general attendance began to dwindle, these events became pretty much impossible to recreate. These brigade events were only once a week tho.