To me, this episode harkened back to the days of the "art of the stall." For example, Kate's statement that she didn't know why everybody else came back but she knew why she came back. But of course she didn't go on to explain exactly what that was. Typical LOST bullshit.
It's pretty apparent to me that they're close to the endgame but now they've got to put some filler in to make enough episodes to get us to the end of next year.