I have had 2 instances where a learner did not feel comfortable in completing a component of the curriculum because of previous knowledge that they did not have.
I still need to mark the user as having completed the curriculum even though 1 course contained within is not finished. It would be good to have a notes field in the EDIT ACTIVITY screen for a course/curriculum so you could make notes why someone didn't complete. Or why they got a certain mark, etc.