I just shared some general advice with a writer. Editors see something, they like it, and they order a few changes. They liked what they saw. Sometimes a writer will come up with something significantly new, then resubmit that. But I would think that, more often than not, this "ends in tears". It needs to be what the editor saw and would like to see. OBSERVATION: I think, too, of academic supervisors, who often order changes. They want to see the changes that they ordered, not something else. One can put the "something else" in a book one day and become famous for it.