Decent but preachy is a way to describe many episodes of "Quincy"--and these episodes are generally among the worst in the series. Instead of focusing on investigating a death, these episodes focus much more on a social issue--and the doctor stomps about preaching about some particular issue. This was the case with such topics as child abuse, spousal abuse, rape and autism. Here, the topic of affirmative action* is the subject of this episode's sermon--and it comes off as more of a message piece than a piece of entertainment. Fortunately, when the story changes and the TRUE reason for the death is discovered, the episode becomes much, much better.
So is this a great episode or terrible one? Well, some of it clearly will depend on what you think of affirmative action. If you think it's necessary and good thing, you'll probably enjoy the show more than someone who is against racial preferences. As for me, regardless of my beliefs, I just think there was too little emphasis on the killing and too much on the bloviating.
*Outside the US, folks may not be familiar with the phrase 'affirmative action'. This is a policy where there are quotas to hire or offer school admission to a particular disadvantaged group, even if their qualifications are lower than the rest of the population.