The symbols are a tool. They are a roadmap. Do not mistake the map for the journey, or the destination. It would seem, that people often have an insight into the system after using it consistently for any length of time. Likewise, seeing new symbols is nothing extraordinary.
Sacred geometry is older than Pythagoras, and common to many esoteric and spiritual practices.
Most of these symbols have a specific meaning to the person viewing them and do not constitute a new system. Still others have added in techniques from other things like space aliens, ancient civilizations, Celestine Prophesy, Wicca, Tibetan practices, Ascended Masters, etc. Remember that symbols were a tool to be used to aid you in connecting to the energy, and to guide you but ones, like all conditionings that were to be let go of when no longer needed. For many these days, Reiki has turned into a business. Businesses thrive by continually coming up with new product.