Well, from what I can see...I think the course pretty much teaches us the basics of "work language". This, I figure, is essentially how to talk and communicate such that you avoid conflict and misunderstanding at work, as well as allowing you to present yourself well so that you can move up the ranks at your workplace. It also appears to involve knowing how to do reports and projects properly.
For me, I would say that it is a useful skill since it's something that I would need and currently do not have at all. For example, should I be sending an email to my boss, I have no idea what is the proper way of phrasing things. I know this from experience since I worked a little part-time before university, involving transcribing videos of lab classes at NTU. When it came to the point where I was done with my work and was to send the files to the teacher-in-charge, I felt uneasy and unsure on what message to attach to the file. My message pretty much amounted to: "Well, here are the files, thank you". From reading some of these Professional communication stuff, I'd say that wasn't very good...er...professionally.
Of course, the module is not just about files and paperwork but actual talking. I can talk to people well enough (my time in the class will probably test that theory) but when it comes to work I am unsure. At my NTU job (since that really was my only job...ever..) I was unsure how to approach the teachers that I needed to talk to. It is true I just kind of walked up and said what I needed, but removing that anxiety would be something that could come from experience which is basically part of the module itself.
Summing up, I dont know how to talk professionally and the module will do just that.