At the beginning I wondered if Joss planned to insert flashbacks to fill the blanks. He often talks about his passion about Battlestar Galactica - a show that has jumped two years forward between 2 and 3th season and has creatively used these two years in season 3 flashbacks.
But, so far, instead of tying loose ends writers create more loose ends. Maybe it's too soon. If it was a TV show we'd be at the end of a season by now. But in this media we're still in the middle of the second episode.