You can't fill up a "stage management" class with just the practical skills. we probably spent the first month or two learning to do the job and the rest of the year was, Project management, communication skills, dealing with unions, multitasking, interpersonal relationships, communication, copyright, and the seminar. I don't think each of those needs to be a separate course .
I took a scenic design course with hand drafting, but learned reading a ground plan in stage management class first. Honestly the skills I learned in SM are the ones I still use, the others are nice to know but not as practical.
I was excited for my directing class, but it ended up being terrible because it was taught by an acting grad student, and the whole class was acting oriented and SMs are the only "tech" student required to take it, so we could not really relate it to stage management, still got a lot out of it, but make sure the class is equally balanced and that the person teaching has some knowledge of our perspective beyond "I stage managed a bunch of times (because I couldn't get an acting gig)"
Acting class was very good and a requirement, having stage presence, voice, all of these things are excellent for SMs and just knowing a bit about how actors work, and the stress of their jobs too.
My college offered a "Theater Outro" course in our second semester senior year....basically an "I have a degree in theater, now what?" class on marketing yourself, putting together a resume, where to look for jobs, AEA, etc. While it was more geared towards actors (we didn't have many tech/prod students) what I did pick up was amazingly helpful.
Seconding classes in acting, directing, and lighting!
I think that's a little late to offer this course only because you want to have a wide range of experience by the time you leave school and the only way you're going to be able to apply to places and have that experience (like summer stock) is if you are a strong candidate from freshmen year on, then when you leave you will have a nice resume and already have tons of actual interviewing experience.