Improvement is just when you make a change and you subjectively think the positives outweigh the negatives. If the negatives subjectively don't outweigh the po

Improvement is just when you make a change and you subjectively think the positives outweigh the negatives. If the negatives subjectively don't outweigh the positives, that's usually considered "deal with the devil" territory and is the kind of thing sci-fi writers love.