One of the main crew members is a Commissar appointed to the ship by The Party whose job is to oversee the crew's ongoing political education. Technically they also have the job of rooting out spies and wreckers, but the society no longer faces capitalist encirclement so these functions are seen as somewhat of a historical footnote.

The ship's other officers are all elected by the section of the crew that they represent, so the bridge staff is one representative each from engineering, ops, security, etc. The captain is similarly elected, and all officers are subject to immediate recall by the crew outside of times of crisis.

Most of the "space ethics" stuff remains the same. The only difference I would give is that the captains would be given far more trust to resolve "prime directive conflicts" themselves, ie being allowed to save underdeveloped planets from plagues and natural disasters. The only red line as far as the Party is concerned is anything that relates to capitalist exploitation or imperialism, so interfering with an existing society's political or economic system is grounds to be purged.

The hallways are filled with art that is 50% posters that look like the Chinese-Soviet alliance propoganda and 50% graffiti-esque art done by the crew in their spare time. The hallway set should never look the same twice, though more diplomatic spaces are probably kept beige to avoid insulting visitors.

More time is spent in The Federation itself. It is revealed that, with lower needs taken care of autonomously, a renaissance has occurred. Massive public art exhibitions and sporting events are the norm, with almost all work being done by machines and what's left being done by groups of volunteers (join your neighborhood's service org today!).