It's not unexpected that some designers may feel their level of comfort with the night rules doesn't permit them to fully utilize the new counter-mix, rules, etc. And night actions seem to have been far more common in the Korean War, probably based on the experience of the World War II vets that heavily populated both sides. Even from 1944 on, night combat was increasingly looked at as an opportunity for making real headway rather than a tactic of last resort. From late 1951 onward, the static phase of the war, actions tended to decrease in size, and night actions became more prevalent. There were exceptions, as the Chinese are a lot like the Russians in World War II - their operational skill improved steadily, in (I presume coincidental) proportion to the growing number of artillery pieces they were able to deploy. Some Chinese units were able to mount impressive daylight operations in 52 and 53. Reading up on the Canadian brigade, it's kind of astonishing to see how relatively poorly they rated themselves and how much they thought of their Chinese adversaries.