You said, "This has been my intention from the beginning, but the event that triggers this is kind of the climax of the whole first book. Trying to motivate her prior to this has been the problem. I think I'm leaning K and NJC's direction in letting her join a third party outside of the Scofflaws and the Empire. The details of that have yet to be determined"
Here's a thought to chew on. It is incredibly hard to figure out where to start a story. Where the book begins. Writing an entire book to get a passive character into the game is more like a character exploration, rather than engaging action. Don't get me wrong. I understand the value of the 'reluctant heroine' who is sucked into the action despite every effort to leave. If that is your goal, then give her no choice. The trap door closes…she has to duck under or be trapped for eternity. She has to decide whether to get on a plane or stay and live a safe life…but then she realizes her purse is on the plane and it has the only existing picture of her dear-departed gramma tucked inside.
In other words, it is fate shoving Maya forward and she is caught in the current.
Otherwise, start your story AFTER Maya realizes her priorities so that the action flows. Or make Maya a secondary character who the other characters have to motivate.
It's hard to change the format of the book, minimizing the struggles of a character you identify with. For me, Airen was the character I identified with the most. When people read the first few versions, they really didn't like her. When I turned attention to Kha, Airen fit better. Going into her head made her more of a bitch rather than a mystery.
Ironically, Alda is the character I identify most with in Dictates. However, I had to be prompted to add more of her perspective.
K is going to have a field day with this one, because he keeps hoping that Airen is going to be dropped into lava or eaten by a dragon. No love lost there.
So my advice is to figure out where to start the story. When I paid for a critique from a Lit Agency, the biggest compliment was that I picked the right place to start. The surprise was that I didn't do enough world-building to let people understand the context.
Either way, your story…your world.