This is from an interview with Damon Lindelof where he talks about Juliet & Sawyer. <3
When the show wasn’t taking risks, that’s when it wasn’t any fun to write. The problem with taking risks is they’re risks, so you don’t always come up aces. We did this episode called “La Fleur” in the fifth season. The big risk that we took in that episode was, not only that we were going to jump ahead three years in time with all the castaways on the island — who basically got indoctrinated into Dharma — but the big risk was that Sawyer and Juliet were going to be a couple, and you weren’t even going to see it develop. You saw one glimmer of them having a scene together, and in the next one they’re full-on in a relationship. We were just going to fast-forward to it all. When we saw the first cut of that show, we were like, “This is literally going to … it doesn’t work at all. This is going to fail.” But we already shot three episodes beyond this, we were committed. Elizabeth Mitchell and Josh Holloway both told us, “We’re not sure if we can sell this.” Our gut told us that Sawyer and Juliet was going to work if we just give it time and believe in it. It was like Tinkerbell: Just clap your hands, and it’s going to work. Somehow, through the editorial process, we willed that episode into working. But before it aired, we had already started coming up with a plan, as writers, to cut Sawyer and Juliet. We were fairly sure that we had done enough damage control for the episode not to be terrible — but the audience was going to reject that relationship. When they saw the episode, they loved it.
Source: Hollywood Reporter – Thanks Yiyi for the head-up!