The fundamental determinants of course quality have always been (and will remain), the course content, the instructor(s), the learning activities in which the students are engaged, and the students themselves.
We do not make any exaggerated promises about the transformative nature of technology in education. Technology, Sakai or otherwise, can be used to improve your course by allowing you and your students to do things that might have been impractical without the technology, or by reducing the amount of time spent on administrative issues. However, the tools Sakai provides are just tools, and unless they are used purposefully, they will not make much of a difference. Therefore, it is most important for you to consider what you want to accomplish with your students and how the capabilities Sakai provides can support the course activities.
There is no such thing as a "best" way of teaching. What works in a small graduate seminar in philosophy may not work in...