Let me throw something out there that won't happen at all. How about removing the eco in general?
Set some unobtainable item as the currency, it's in game and can be easily removed or destroyed. No server owned shops at all, make every player have to go and get their own items or trade using either that ingame currency or with other items. Need bone meal for that farm? Better get a dark room mob grinder going and hope for the best. Remove the nerfs on most farms and redstone. Can you see where I'm going with this? Make this as much of a vanilla experience while still keeping towny involved. Idk just an idea that definitely won't happen.