Seaworthiness wasn't really studied until the early 1950's when the Canadian navy started a major study which the RN joined in with which led to the very seaworthy late 50's Canadian and RN escort designs. The USN didn't really get involved until the very late 50s. D K Brown was involved and had a particular interest in such matters during his professional career, as he covers in his writings (both professional and hobbyist).
Too much flare was a common problem.
In the WW2 period, the RN regarded freeboard as the most important factor.