The course work is made up of many small assignments and discussions. If you get full points, you are meeting or exceeding the requirements.
For personalized feedback, there is a trade off. If everyone gets a lot of feedback on every assignment, you would have to wait a long time for your grades. So most of the time you get a grade and sometimes you will get specific written feedback. However as there aren’t really right or wrong answers, full points says you are doing fine.
There is usually personalized feedback for exceptional work or for work that doesn’t meet the requirements or is missing some elements of the assignment.
No news is good news.