A double edged sword here. USFK is undoing years of decline of US combat capabilities but the rotational force presence concerns the Koreans. There is a lot going on with the alliance right now that needs to be worked out from the special measures agreement to the transformation of the CFC (e.g., OPCON transfer) to preparing for regime collapse while maintaining the necessary strong deterrence and defense capabilities. With US fiscal challenges the Koreans worry about the easy decision to not rotate forces in order to save money. One of the ways to potentially alleviate those fears and strengthen
interoperability might be to return US forces to rotations on the DMZ conducting actual combat patrols integrated with the frontline ROK forces.