And who should replace him? None of the others have any space tactics or leadership experience. It is telling that Amos' reaction to Holden disarming the nuke is that he strongly considers leaving. He has no interest whatsoever in running anything himself.I believe they meant the crew should have removed Holden from command, and I agree. I think they should have done it a long time ago, but the guy just seems to fail forward constantly. Like a lucky charm following Holden at this point.
The only person who could reasonably replace Holden as commander of the Roci is Bobbie, but she's a guest and a friend, not really part of the crew.
In the books, Bobbie joins up with the crew on a more permanent basis after the creation of the Transport Union, and at the start of Persepolis Rising (30 years after Babylon's Ashes) Holden and Naomi hand over command to her when they are about to retire.