Good idea DoubtingBro, but I think there may be one issue.
The only problem I see with it is the GB know how many personality and other issues can occur on a body of elders which is one of the reasons COs and the old DOs worked alone but under tight control. If they used a body of elders from various local halls they'd still need someone to oversee them to nip trouble in the bud. Perhaps one of those elders could be called the CO but in fact not be a paid or travelling brother. He'd have control to stop problems but the body as a whole could do the other work involved in running a circuit.