Is there a silver lining within the DPRK claim to having achieved their long sought inter continental ballistic missile IOC?

Maybe so. 

We currently have a LOT of technical assets in the ROK south of the 38th parallel (e.g. the long range AN/TPY 2 radar that feeds THAAD). Ergo we are in an excellent position to do some valuable research including the harvesting of [1] GPS launch site coordinates in the  DPRK and [2] some vital sigint signature data emitted during that most valuable (vulnerable) part of their ICBM flight regime, the launch/climb out phase BEFORE the bird goes exo-atmospheric. By applying these data we can sharpen and refine our missile intercept capability ashore, aboard ship and in low earth orbit to the point where we might well be able to destroy these SNDV blooms soon after launch instead of trying to pick them off in space or even worse in the brief terminal phase after warhead re-entry on its way to the desired ground zero on our homeland. Let's be optimistic.