We find the courses with high ratings and popularity to be most valuable. If the content is applicable, we encourage team members to use it. Regarding skill assessment, I haven't used that feature much, but we've done a few trainings with evaluations, which have been helpful for learning.
I think the assessments in Pluralsight are already good, but it would be helpful if there were explanations for incomplete questions or for which we couldn't provide a proper answer.