It's been a while since I was in publications. Someone will correct me if I'm wrong; Editors have the right to suggest changes. It's best to talk things over with the writer. That's why deadlines were invented![]()
Your deadlines allow time for the writer write, get material to the editer, editor reads the material (editors edit, that's their job) suggest changes, the writer gets a revision back to you and then it's off to the press.
Writers write, editors edit. If you make changes without permission I'd take the writers byline out.
But if the material is deemed unfit/unready for any reason it can "end up on the cutting room floor"![]()