There is no need to start from scratch. The job has been done, and the link with the past is worth retaining for those who appreciate it. Of course, we all do different things at those times, but for all of us they are alive with significance. At all these times we are reminded powerfully of how we are linked with nature, and how nature is linked with the rhythms of the solar system. The tricky question of magic Magic is not focal or central to paganism.
Pagans can be pagans without using or believing in magic.
The association of paganism and magic is to some extent a historical accident. And from the point of view of the scientific pantheist, this association is unfortunate. One tenet of scientific pantheism is to keep an open mind. Fifty years ago mainstream medicine would never have accepted that the mind can influence the course of disease. Today the placebo effect is well proven and quite strong.