Revising is The Pits

I am revising a story, and I am not sure how to proceed. Do I take out the time Reuben falls out of company, do get him caught in the end by Peter and then saved by Brynhild? Do I remove the remarks about Wilhelm's competence? It has a weird structure. Now, I just finished Agatha Christie's The Big Four, and she has a ton of mini-climaxes in hers, rather like I solve my murder half-way through the book and spend the back half working out the moral ramifications and catching the murderer.

But I am not Christie. Far from it. What should I do?