Unfortunately, there is nothing further South Korea can do until North Korea actually launches a full attack. Seoul can't be moved. South Korea can't attack preemptively unless North appears to be preparing a nuclear launch. Death in tens of thousands within first three days of war is expected and accepted. Horrible, yes. But years of threats have tempered reactions and people must go on with their lives.

Chances are NK will launch a restrained attack on one of the islands near border, inviting a response which I'm told will be measured yet quite strong. What they want is a stage to put on a display of thuggery because all they're getting is a busy signal, ruining their Gangbook style.

Anyway, IMO and all that.