I think that's a pretty good jumping-off point, really - the series finale, I mean. For what limited time and episodes they had, they did a nice job of leaving a somewhat thought-provoking cliffhanger. Of course, one could argue that if someone wanted a real 'game-changer' as it were, well, there's always the other game.
Maybe it takes something like that to increase participation? Maybe holding more to the show, more to "plausible" or "safe" scenarios - stuff that we could and might and have seen in the show - is constraining. I understand the DF and nightmares and all that are fun because people have a carte blanche to do whatever they want, but something that deviates from the safe topics of the show could be fun.
What we need, I think, is an identity. Chapter Five: Humanity, right? A time to define ourselves, to discover what makes our characters…so why not apply that to the game? What makes our game special and unique and makes people want to play here? Are we a show-clone? Are we striking out into new territory? How much freedom and story-bending do we want to leave in our, the players,' hands?
I think that's probably something to address first, and when that settles - are we moving in a dark direction? Are we moving in a direction to reveal evolved? Where are we going? - we can really start moving the entire game in that direction through concerted RP across all our alts.