Yeah, the whole "we have a 5-year story but we can do it in 1" just indicates they have enough padding to get through 5 years, not that the story itself needs 5 years.
But this is TV and it's still a job. Who would be stupid enough to say, "we're only going to do this for a year"? They'd be putting themselves out of a job! Five years is a nice run for a TV show.
They should just develop a story that truly needs 5 years then. They did it for Lost. At this point, I don't the writers are up for the task.
Mr Awe
Let's not pretend
Lost didn't do its share of wheel-spinning, they just made it very entertaining.
Very, very few shows start off with anything like a "master plan" for so many years.
Babylon 5 is pretty much the only modern example, where all details were planned out before the first episode was shot.
Serialized shows by their very nature have to take a more flexible approach. You don't know up front how many seasons you're going to get. This is just the reality of TV.
If I had to take on such a task, I'd probably do it like JMS did in terms of having "escape hatches" for all main characters. Then I'd figure out the
ideal number of seasons required to tell the story, episode by episode. Then, I would start paring that down to account for early cancellation: if there won't be a second season, what would make a good finale? Do that for each season to the extent that it's possible. Maybe leave enough room for a follow-up TV movie assuming such a thing would ever happen.
But it's a lot of work to come up with all these contingency plans you may never have to use, or five years' worth of scripts you may never get to shoot, so I'm not surprised people go into these things without a detailed master plan. Writing for TV is a job, and like most jobs, you aren't going to do any more work than you have to if you can get away with it.
It doesn't excuse the sometimes shoddy quality of SGU's scripts but I think it helps explain why the show seems so uneven.