When I made the changes back in June, admin users could not display all events for all courses, as in my opinion, that is ridiculous anyway, as there was no distinction between any course events at all, so you had absolutely no idea what courses the events related to. As an admin user, you displayed events for a particular course by selecting the course from the drop down list
With regard to course names, it is the course shortname that is displayed. You get the course id's if there are no course shortnames.
Pity nobody has been paying any attention to calendar, as there were quite a few other issues that were also fixed, and nobody at all has responded to the proposed changes, in the bug tracker and in the forum, until now.