FWIW, at ADV we've implemented a beginner course like this during the past year.
We teach a 4 week once a week cycle exclusively to help orient the newcomers into the dojo culture, as well as start working on basic falling skills. we also have alotted time to beginners practice during the week, but these are open classes and follow the regular format.
During this period we cover the most often used terminology, plus introduce the beginners to some of the basic concepts and principles, do a lot of explaining about what is done in class, teach the warmups , aiki taiso; etc
So far, it's been well received by the beginners, and it helps make the process of starting out less awkward.
I certainly wish the program had been there when I started.