I guess it can be a feature after one has reached an ending to allow them to experience the story the way it's supposed to be first before showing them a timeline of their choices to which they can go to a specific question to try to go a different path. However, this might be more complicated due to your bargaining feature. I mostly suggested this because I tried to find an ending that was complete but felt like filling it out again took too long.
A game that kind of uses this timeline mechanic is some of the later entries in the stickman Steal the Diamond series done in Flash such as the game "Fleeing the Complex" where they have a map that shows the branches where you have been and lets you go back to a point but doesn't show you all the possibilities immediately.