I think the biggest takeaway was the reality of inactive learning. Many times, if a student becomes disengaged, it is due to personal situations beyond the instructor's control. In my program, most of our students are returning students. Our average age is in the mid-30s. So, life can take over for a student. However, it is critical that we (as instructors) assess any disengagement carefully to determine if we can make a modification to re-engage the student.
Another important point that was made included that not all class groupings are the same. We all know not all students are the same, but oftentimes a different section of the same class in the same semester may have different needs and/or personalities.
I think overall, it's about keeping the teaching diverse to meet individual students where they are, but also remembering to re-asses on a regular basis.