How G3 and N3 ideas might merge without Washington

Without the Washington Naval Treaty, would Britain blend the G3 and N3 concepts into a later fast battleship?

Potentially, but the successor design would depend heavily on how other navies continued their own construction programs.

A blended follow-on class is possible, but its form cannot be isolated from the international arms race. British design choices would react to the size, speed, armor, and weapons of ships laid down by other navies after the G3 and N3 programs.