Why Britain struggled to rotate Pacific commanders

What if Britain had enough senior officers to rotate commanders in the Pacific as the United States did?

Rotation could improve reputations and performance, but Britain lacked the same depth because it had to staff commands across many theaters rather than concentrate on the Pacific.

American commanders could rotate through a theater that held much of the country's senior naval attention. Britain had to provide command teams across the Atlantic, Mediterranean, Indian Ocean, home waters, and Pacific, leaving less spare depth for a comparable rotation system.