Tris and Tobias's love grows stronger, they get through everything. Things change, things stay the same and things move on. Fear are faced and fears are changed. Tris and Tobias's relationship is completely steady. They contol their fears, change them and overcome them. Their lives have changed and adapted to each other.
Al, Will, Tris and Uriah etc are still alive as this story is set before Insurgent and war. There was no transmitters found and Jeanine is hunting Divergent but not Dauntless ;) Enjoy the training, initiates.