Conversely, you can make the case that it's okay for a show to be not quite as great in its sixth or seventh seasons. History teaches us that shows which reach that age are normally in a state of decline, very few shows reach their peak in season 6 or 7 (The Shield being the only exception I can think of). By that time writers are running out of ideas, they begin repeating themselves, or they jump the shark, so the fact that DS9 was still a quality show when it reached that point (as is the opinion of most) is commendable.The thing is, I think a show has the right to be not quite as great in the first season.
I dont really think you can make that sort of argument. As I said, the 'failures' of season one were due not to bad writing, but by the use a trial and error process, testing the waters to see what kind of shows would work for DS9. This produced episodes like 'If Wishes Were Horses', but it also produced episodes like 'Duet', and the next few seasons refined what had worked well and built on it.
The fact that history teaches us that shows tend to fall apart in later seasons seems to suggest that the writers should have really focused on this, and come up with various methods to avoid it. They should have known that doing things like:
-Making your main antagonist fade from the story, and changing what makes him cool
-Seperating your two stories into two totally seperate climaxes in the same finale.
- Using poorly explained paranormal and intanglible bad guys.
- Bringing in a new character at the start of the last season.
Are basically not going to make your show that great. I mean I know people are pretty divided about Ezri, but nobody on here seems to like the Pah-wraiths. There must have been writers on that show that knew they were a terrible idea, but nothing was done about it. Thats a lot different to what happened in season 1.
My ideal would be to shorten up the show to six seasons. Everything would be the same until the end of the opening six season arc; Jadzia would die at the end of this, just at the moment of triumph as the station is taken. Instead of bringing in a new Dax, we would actually be able to see the grief acting on the crew, Worf would be desperate for battle, Sisko would lose confidence in himself, Julian would fall into depression, and the rest of the crew would just have a general sense of defeat. This is where I would have placed 'In the Pale Moonlight'. With the Romulans in the war, the Dominion forces (including Dukat) would agree that the wormhole needs to be opened for reinforcements, and DS9 would then become the central point of action. Sisko's success in getting the Romulans into the war would actually be visibly beneficial in this version, and give the episode more depth.
As DS9 becomes the focal point of the war, it becomes a station under seige. This is where you place an episode like 'AR558'. The crew becomes united again under the pressure of fighting, and this leads to the final battle against the dominion. We'd still have the founders illness, and the battle would play out much like the original battle in 'What You Leave Behind', accept the founders and Weyoun would be on a flagship. Odo would then make his offer to return to the founders and heal them in exchange for surrender. Dukat, enraged, would take control of his ship and head for the wormhole, intent on destroying it, crippling Bajor. Sisko, realising his purpose, would take a runabout or something and sacrifice himself by ramming Dukats ship. At the last second, he would be saved by the prophets, and when then appear for Jake and Kassidy to let them learn of his fate, the same as in the original ending.
I know this isnt perfect, and some episodes would have to be cut, but this eliminates a lot of the redundant aspects of the series, and I think it would have made the story a lot tighter.