Sorry for going OT... finally ... as requested
As a student:
1) took a while, maybe better if it was persistent in navigation not on my home page
2) pita in that mockup as I had to go through participants, usually (as a student) I would click through names in forum posts. I dont think students use the participants list much.
3) ok, that was clear
4) great addition, having one page for grades is something we want
5) nicer button, liked the popup, it is an improvement
As Admin
1) gave up
2) went through participants list in course
3) liked the links to the outline report etc
4) easy to find under admins profile