We rolled it out as a feature in the latest versions of the theme.
I believe now is possible with Edwiser RemUI versions 3.5.11, 3.6.8, 3.7.7 & 3.8.0.
There is a setting part of Edwiser RemUI which could be enabled or disabled for this purpose.
Simply follow this path Site Administration > Appearance > Themes > Edwiser RemUI > General Settings > Checkbox to enable "Course Edit Button" at the bottom of the page
In the solution that I suggested Admins will be setting the default state of the activities within a course and later when students explore the course whatever status they set the course activities it will be displayed accordingly.
So in a way it is actually working in the same concept that you had suggested just that we have provided admins an option to choose the default state for course activities.
For now, we have improved the user flow between courses, sections, and activities.
We have for now made sure that these sections, courses, and activities title are clickable in nature most probably in next update we will make the whole card clickable in the "Card" layout