How nuclear power would reshape Queen Elizabeth-class islands

If the Queen Elizabeth-class carriers were nuclear powered, how would their facilities and island arrangement change?

Removing the exhaust stacks would weaken the case for twin islands and could move a consolidated island into the forward-lift position.

The real twin-island layout gains a strong justification from the two exhaust uptakes while also separating ship and air-control functions. Without those stacks, the design dispute would have been harder, and the forward island might have moved into the forward-lift position with the lift relocated.