Some more thoughts about Korea 2:
1. The South Korean Navy will need to evacuate to the Sea of Japan side or they'll just get sunk by PLAN subs in the Yellow Sea. They are unlikely to be able to deploy their P-3s in the face of PLAN air defense. Even on the Sea of Japan side they can still be hit by PLARF ASBMs, coastal defense and naval aviation, as well as KPN subs on the Sea of Japan side, but they can preserve more of their forces. I don't forsee a significant role for the ROKN - the Yellow Sea is only 700 km wide, most of it is already under Chinese and North Korean control, and China's entire northern fleet is there.
2. South Korean Army is very tube artillery heavy with 7000 pieces ~4000 towed pieces, ~3000 SPGs. It does not seem like South Korea places much emphasis on drone observers for their artillery, so that will be a disadvantage. I don't know how accurate Wiki is, but it says
.
to make up for this, but it seems most of these are towed and do not have drone observers, and are deployed near the front where they are likely to suffer significant attrition.
3. PLA ground force advantages on the other hand is in mobility: more and better tanks (4500 vs. 2600), heavy armored vehicles (12k+ vs 2k), long range missiles, drones, air defense, MLRS. PLA also enjoys air superiority and naval superiority in the Yellow Sea.
It seems to me South Korean forces basically serve as the "fist" to the US "brain", as they seem to be very heavy on shooting assets but light on recon assets. The US is going to provide them with data from satellites, AWACs, drones, etc.