The commentary is not only good, but needed.
Well I agree with the second part. Social commentary is a key part of what Trek is about though I always liked the term of exploring the human condition much better. That to me means your not just exploring society but also the everyday nature of human beings. Plus you don't just talk about current events but stuff that has happened throughout our history as well. You could do a whole season about the Black Plague for example even though that isn't really a modern issue.
Jason