oh come on, your rationale for describing DS9 as being no different from TNG is just silly.
First off, DS9 had eight main characters, not seven, and a much bigger recurring character list.
The setting was totally different, their mission was much more political than exploratory, the show was much more serialized, there was a full-on WAR going on for the last two seasons, etc.
DS9 was the most different of all of the Trek shows. Like it or not, you can't really dispute that. Saying it's the same because "most of the characters were humanoid" and "the captain was the main character" is just reaching for the sake of making your argument. DS9 was closer to BSG or Babylon 5 than it was to the rest of Trek.
your argument is like saying there's no difference between "Sherlock Holmes" and "Monk," because they're both about male detectives who often work in cooperation with the police.
Hmmm. I have no knowledge about "Monk" and I appreciate that you subtracted the critical part of my argument. Perhaps you couldn't effectively counter it. But the point was most effectively made by the comparisons of what Trek didn't do to break the mold.
Breaking the Mold in the old Trek formula would be ...
A Heavy focus on one main character.
More action than adventure
Changing the entire look of the show (like Star Trek 2009)
Becoming a suspense series like LOST
For example.
SGU attempted to "break the mold" of Stargate's Action Adventure and Humor by creating a slower paced human drama.
For example.
The game
Wing Commander "Broke the Mold" in the 90's by making the first Video Game in a Movie setting where your actions had an impact on the route to victory.
Babylon 5 "Broke the Mold" by using ALL CGI with a weekly budget.
Matrix broke the mold by training actors to accomplish real intricate martial arts moves in movies successfully and convincingly. It was also the first time CGI was used in combination with Film to provide a 360 view of the action.
Was DS9 more political: Not really. TNG had it's fair share of political intrigue in fact it likely has more than any other Trek series. I think we believe DS9 was more because of the continual diplomacy between Cardassia Bajor and the Federation but Enterprise was always fairing diplomats negoiating peace treaties and solving problems most often with the pen rather than the sword.
Was DS9 more serialized: Yes, it had more continuous plot threads because of the emphasis on Drama and Character
DS9 did break that Trek mold but it wasn't the radical change breaking the mold describes. TNG broke that mold first from TOS. I there was one episode "Menagerie" and CAGE which were flowing story lines every thing else was purely episodic. So do we really give DS9 credit for being more? I don't think that's particularly fair or objective.
DS9 was the first Trek Series to be at War:
Sure but it wasn't all it's cracked up to be. After Season 5 the War essentially was dormant in Season 6. It was almost like it didn't matter after they got back to DS9. Then consider that Babylon 5 had a more substantial war in a more desperate situation and it was going on at the same time as DS9 definitely takes the wind out of that sail.
If we're going to say that DS9 broke the Trek mold just because of a setting change from ship to station or a quest change from exploration to diplomacy then certainly Voyager was breaking the mold too by changing the quest from being in home waters to being lost. And I don't believe that either.