I really don't see the purpose of this series. Yes, it offers more copies of the spells [and more than just +6 when considering Fractal, Mitosis, etc.], but in most cases, you don't need that many copies.
While we are lacking in a flow of ideas, for future consideration, if you release a series of ideas that have a very similar mechanic, try to space them out rather than unload them all at once out of consideration of other designers.