I think you really hit on something when you spoke about the relevant issues. I agree with you. DS9 feels like a show that could be made today. It was a show ahead of its time in many respects, and I have to wonder if that was one of the reasons for its declining ratings. I've long felt that DS9 was the true inheritor to TOS due to its approaching to draping late 20th century issues in 24th century trappings.