That's why it would have to be novel length. It all needs fixing. You'd have to throw out the entire thing and start over, write an entirely new plot or at least take an entirely different approach.

The betamax tape plot, punctuated with Big Emotional Moments, is the worst structured ending to a series I have ever suffered through. I can't believe people got paid to write that shitty material.

Sidelining Olivia was a mistake, for sure.