Teachers can't figure out how to read the grades and therefore can't explain the grades to their students. No developer to maintain workshop. Bugs in grading. Net result: Workshop fades into the background and Moodle moves one step closer to becoming a commodity LMS.
Incidentally, the typical user documentation for Workshop gives a blow-by-blow description of the UI and regurgitates the help files. This kind of documentation is useless to readers, and I doubt that its authors understand grading any better than their readers.
Workshop needs is a UI that is closer to the user's mental model of how grades are determined. Or, if the user doesn't have a mental model, the UI must help the user form a mental model. Then we need documentation that references the model.
Your grade in a Workshop has two components: a grade for your submission, and a grade for your assessments. My mental model is an N x M matrix, where N is the number of students and M is the number of submissions.
N and M are usually about equal, since each student makes a submission. Therefore we have a roughly square table. For a decent size course, the table is big, maybe 30 x 30. If the student does only self-assessment (as in an Exercise) we get a diagonal matrix. If there are peer assessments, there are off-diagonal elements. But in any case, the table tends to be sparse.
To conserve screen real estate, the current Workshop UI compresses the big square matrix into a bunch of compact tables. And by so doing so, it destroys the connection to the model.
What if Workshop actually presented a big square matrix? Would users have a better understanding of how grading works? Even if they had to scroll, which would be annoying, I would say the answer is Yes. I say this based on my own experience remapping the output of several workshops. Once you do this, the grades virtually jump out at you. Documentation keyed to this matrix, rather than to the current UI, would be able to explain the subtleties of workshop grading very easily. See screenshot.
Once you see the grades displayed in a natural way, bugs in the grading algorithm also jump out at you. If the bugs jump out, maybe some developer would be willing to jump in and fix them. With the current UI, a single bug has a ripple effect causing it to show up in several tables.
Can we please focus on Workshop and not bring "peer lite" into this discussion?