Characteristics of Online Courses: What is most important?

The four characteristics outlined in EL101 (structural integrity, navigational simplicity, learner-centered learning, and intellectual interaction) are all necessary components, but when looked at individually, each one can be considered just as critical as the next. For example, if all characteristics are present but the structure integrity and flow of a course is disjointed, there is a higher likelihood of low motivation from the student and/or dropping a course. 

If I had to rate the characteristics to prioritize when developing an online course, I would rate the following(1 being most critical):

1. intellectual… >>>