I've already sold my group on the concept. If the one-shot goes well, there will be 4-5 more core book sales. Hopefully, that pattern continues, though a little marketing push would be nice. No one I know has heard of Genesys before I mentioned it to them.
As far as lack of articles, a generic system is hard to tease without either giving the goods away or being worthlessly vague. The articles published so far all boil down to "Genesys has rules for you to build stuff." Even the magic article could be fairly summarized as "there's a skill-based spellcasting system and implements alter that, but you can change it all if you want". No concrete details to be found. I think FFG has just struggled with how to give us something without giving us everything and come up short.
I strongly suspect we'll see a surge of marketing for the settings/genre books, which will tacitly push the core book sales as well. On its own, there's nothing really sexy about the core book because it's basically just rules to make other rules. The implementation is what will grab people.