Hi Steph.

With the Enhanced Catalog enabled, clicking on the blue "i" icon next to the course name (or anywhere in that table cell other than the name link) should show the users some information about the course. Currently it seems like it shows Course Summary, Status and Enrolment Type. The expanding sections were designed so that additional information can easily be added to them. Perhaps one option could be to get a customisation written which could add the information from the course that you want to show to users that are not enrolled? Then set it so the users can see the course in the courses list but not enter or enrol in the course.

Nathan