There's a lot of dope Bay artists right now. They're just not what most people on this board want to listen to, which is mobb music. To be successful in the bay, you have to be able to walk the line between mobb and lyrical; you need the support of the streets and the underground heads. It's only a handful of Bay rappers that can do that well (namely The Jacka)... most Bay rappers are either one (Livewire, DB Tha General, Bearfaced, etc) or the other (Moe Green, Locksmith, Erk Tha Jerk, etc) or they're swag rappers/alternative rappers (HBK, Show Banga, Main Attrakionz, etc). The only Bay newcomers that are able to walk the line between mobb and lyrical while remaining true to themselves are rappers like Young Gully, DaVinci, Los Rakas, etc. More than other places, the streets play a very large role in deciding which acts from the Bay Area are supported across the Bay. The Jacka has been as successful as he is because he has the support of the streets... same with J. Stalin, E-40, Too Short, etc. Without that, you won't be going nowhere in the Bay. The problem though is that the rest of the country isn't interested in hearing the streets, they're interested in hearing the trend of the week, which never includes mobb rappers or lyrical rappers. To put it simply, there's no big market out there for Bay rappers; the market's right here in the Bay and similar minded places like KC, Houston, etc.
As far as blowing up on a regional level though, I agree with you... there needs to be more of a conscious push from the fans to support the artists (i.e. buy their albums and go to their concerts) than there is right now. Rappers as talented as Gully, Da Vinci, Nio Tha Gift, etc should be household names in the Bay Area, not confined to people in the know.