It's impossible, when revising, to entirely forget that the story's length will be going up or down with just about every line that's touched. Particularly if it's at an awkward length.
No matter how often you remind yourself that a bad story won't sell just because it's been constrained to more publishable lengths.
Even when you remind yourself that a story can't really just be spun out longer. It needs more structure to it. A subplot. A minor character whose help can be made more significant to his own character development, and so create his own character arc within the tale. Or something else to make the tale thicker as well as longer. Perhaps even especially then, when just adding events tempts one to make it longer without making it thicker. To be sure, throwing in a few more events might cause the story to sprout subplots, inspiration can be tricky like that, easily striking the middle of the work. . .
grumble grumble grouse grouse grouse