I was terrible in the Black Sea and Med. Better in northern lattitudes.
I was doing research for a service paper on paint/coatings and their various signautures, so did some prelim research into the paint.
The current paint scheme was developed by research into North Atlantic Fog (which also looks like North Pacific Fog). The ships just vanish in fog, but given that we're not in the 1960's anymore and the ships missions are further afield than the North Atlantic, well changing things is a good idea.
I think honestly, if it isn't just a model builder choice, it will be a move towards a general purpose colour that works just as well in the Arctic or overseas.