The software we used to have (Aries Portal) did not have a "ready to publish" state on entered assignments (at least, not back then). As soon as the assignment was entered, it was immediately affecting grades. I did not have high hopes for usability testing or anything really. You could, at the time, access student info that, as a teacher, you should not have access to (discipline records, for example) with basic url tampering.

As noted before, on Canvas and Moodle, can't have student uploads for assignment without an assignment created, and some won't link correct calendar settings without an assignment.