I recently inherited a small WISP redesign project. When I say small I mean it. I am talking 1 HQ/Tower and 3 branch towers supporting less than 500 customers. The current design is just one large bridged layer 2 network. Now I have been tasked with coming up with a plan for migrating to a routed layer 3 design. My first thought was it is so small and working as-is so why bother. Kind of like "if it ain't broke don't fix it" ideaology. Anyone have any input on this or been through a similar project?