How fast Nelsons could destabilize the interwar treaty system

What wider effects would fast F3-style versions of Nelson and Rodney have produced?

They could reshape German construction, pressure Japan toward an earlier treaty exit, and force an American response to its slow battle line.

If Nelson and Rodney had emerged as fast battleships, the Royal Navy would possess about five modern fast capital ships rather than an isolated pair of slow treaty battleships. That force would shape German thinking about the Deutschland and Scharnhorst classes and remove Japan's claim to the fastest battle line. An earlier Japanese threat to leave the treaty system could then force the United States to react around 1930. A British world cruise would also make the speed gap politically visible by allowing fast British ships to be photographed outrunning American battleships.