Good option. The auto grading of assessments came from the Exercise module where the student's assessment needs to be compared with the teacher's assessment. We used to do this by hand but had a set of rules locally to make it consistent. This session I kinda converted those rules into the auto grading of assessments and then ported it into the Workshop module as well.
It's a bit experimental (and controversal) but it was introduced to avoid the horrendous grading load I have in my courses. In one I've got 50 students doing 6 assessments in a couple of workshops. In another course I've got 500 students doing 7 assessments in a workshop. Thus the need for some sort of automation.
But it's good to make it an option.
I did have some code to override the grading grade. I think it's gone now because there were circumstances when the automatic grading routine would just go in later and reset it. Perhaps that facility, if it were made watertight, would be useful. I think the code is still in Exercise (as here two assessments is only compared once) but not in Workshop (as here the same two assessments can be compared many times).