No one in Washington agrees with this. Esper, Pompeo and drumpf think they can create an alternative reality in the media which will intimidate South Korean officials. The latter understand the scheme much better than the US administration understands them. Two armored brigade rotations have already taken place since the US was threatening to do this in earlier negotiations.
Fat chance. That was bs bluffing.
Without making much headway with imposing costs for the much vaunted "Indo-Pacific strategy" on Seoul; negotiations with Japan coming up soon aren't likely to go any better. Seoul isn't going to pay for the "great white fleet" to intimidate China in South China Sea. Trump the "deal maker" was going to make an example out of South Korea and use it as a precedent to negotiate with other allies. It's a failure. With total democratic control of the National Assembly and the armed forces in South Korea, this is going nowhere.
The US raised the cost of the nine month rotations by rotating unit armor with every deployment. Now they want someone else to pay for that?