This game really needs official persistent servers. There are lots of hugely popular online wargames these days. Maybe battles could last a few hours, and regional conflicts (with allowed aircraft, finite resources, starting positions, logistics, etc.) could last a few weeks. So you could choose any sort of mission (CAS, CAP, SEAD, JTAC, transport, CASEVAC, etc.) and receive points based on your mission performance, be on leaderboards, earn ace status, collect medals, and so on. Maybe a lobby system so friends could join as an element.