To be honest I doubt VGC will ever be able to truly break into the gameguides market, thats already entirely saturated.
Reviews is slightly different, there is a possibility that VGC could become a credible review site but certainly not one of the dominant players.
I think the focus needs to be on sales and data, its what makes this site unique and in my opinion the only thing that has made it big. It offers a service that nobody else offers and so people of course come and visit.