the little glimpses to what happened before the world got the way it was and what happened in between (i.e. Before Sunny) is what keeps the show going.

I swear they just keep peeling layers of the past back each time and it gives us an idea fo motivations for Pilgrim, Widow, Bajie and etc... LIke we just got the red armor cats looking for Sunny, we haven't seen the Master in what in the past season and then we have Pilgrim, it's all building up to something. I'm enjoying the world building in the meantime.