I am not sure on the Planet Ocean but i had a watch maker try and change the bezel insert (not the whole bezel) on an old seamaster with horrendous results. It didn;t line up well and just didn't look right.
If you change the whole bezel though i am sure that would look better, popping the bezel off a Rolex is fairly straight forward, off the seamaster was something i just couldn't do. Was so difficult i gave up and gave it to the watch maker