Given how much it just sort of meandered for the last several seasons without really seeming to have any direction at all, I can't say I miss it in the slightest. The last season I can say I thought was really good was season 3. After that it just seemed to stumble about, occasionally hitting on an interesting plot point, but often stumbling off to something less interesting before too long, and certainly before the interesting bits got explained in any satisfactory manner.

I think the biggest problem with lost is that they spent the first few seasons setting up interesting mysteries without knowing where they were going with them and the show dragged on a lot longer than it should have. I would have rathered they drop a season or two at the end and tighten up the story arc a lot more.