The writer’s job seems never ending. There is always room for improvement, a reason for cutting a particular section that adds nothing to a story, an opportunity for taking a scene further.
I’ve recently completed another draft of my novel. I took editorial advice and implemented most of the changes suggested, then went through the manuscript to tie up the loose ends, and I have to admit that ruthless editing has its own problems. The story improves, but sometimes leftovers from previous drafts clash with the new structure, creating a sense of cut and paste. The new edit then requires another edit to polish the story, and then probably another to catch it from a fresh angle. And then an agent or editor in a publishing house might suggest another edit or two.
Goes on and on.