The G3's likely Second World War role

What role would G3 battle groups have played in the Second World War?

They would likely have operated like Hood, moving around the world to intercept major enemy surface threats.

Their speed and firepower would make the G3s natural counters to enemy surface raiders. They could reinforce threatened theaters without accepting the slow transit of older battleships. They would probably range widely with task groups, much as Hood was repeatedly dispatched to distant operations. The comparison gives the hypothetical class a concrete Second World War mission rather than treating it only as a design exercise.