The Nagus was a much harder episode to watch than I remember. Wallace Shawn is as amusing as ever, but the multiple levels of racism in the episode is disturbing. There are obviously redeeming values in the episode, but they have to do mostly with the subplot.
You don’t have to look back far in human history to see other cultures similarly vilified, with statements like “they just don’t share our values”. What a farce. In some ways, the regular Ferengi characters are more human than the other crew members, even if Rom is still woefully underdeveloped.