Human AWACS
I'm sure this has already been requested ad infinitum, but right now FC3 / DCSW are crying out for HUMAN AWACS - the online game is particularly ripe for this: it would bring a whole new, organised and realistic dimension to the current clusterf*ck of multiplayer red v blue aerial warfare.
I know a few missions already have AI AWACS/EWR, but it has limited functionality: imagine a human with VoIP and a radar screen directing his side's units around the battle space... Then hurriedly calling fighters to defend him from enemies trying to sneak through and take him down....
IMO, the next released aircraft should be DCS:Boeing E3 Sentry!