Why doesn't Canon offer more presets and create more buzz for the possibilities of using their Picture Style Editor? You'd need to ask someone at Canon to know for sure. Having said that, it is probably the same reason they don't promote their own Digital Photo Professional editing software to any degree at all: they provide it free with all EOS cameras and would derive no additional revenue from increasing the number of Canon shooters who also use DPP.

I also think somewhere in the mix seems to be an assumption by Canon that the users of their software products are primarily the type of accomplished professional photographers that advise them on new product developments in terms of both hardware and software applications. Those guys can look at a picture with a particular look to it and intuitively see which colors are emphasized/shifted/muted/etc. They are the kind of power user that would rather write their own preset that gives them the total control to create a signature look that no one else is exactly replicating than to load a preset that is freely available for anyone else to copy. What Canon probably hears more from these photographers is a list of added features they would like to see in the next version of the software rather than a list of presets they would like to see available.

It's kind of ironic in a way. Canon sells more DSLRs than anyone in the world because they dominate the entry level market where the highest sales numbers are located. Yet they make corporate decisions based on what they perceive appeals to the users of their highest end products that sell the lowest number of units. In a way Canon has always been a lens company first, and are a camera maker in order to sell their lenses. This was the business model many companies followed in the film era, as there were little differences in film bodies from one maker to the next compared to the wide variety of film that one could load in any of them. In terms of manufacturers, the differences were in the lenses each brand offered. Only with digital has the hard wired sensor replaced the user selectable film type as the primary determiner of image qualities such as color, saturation, contrast, dynamic range, etc. And well over a full decade into the digital revolution Canon still hasn't caught on to what catches the attention of consumers, as opposed to imaging professionals, in a product.