I have driven many different tracks and the so cal track is just as good as any of them. You are to focused on its location and forgetting the fact that it is a purpose built sprint track that gets used everyday of the week. It is not assembled and disassembled after each event. There is also and advantage with it being all asphalt in that you do not have to deal with mowing the lawn and damaging your chassis when you go off track.
You will be looking for ever if you want to club race and consistently have 15 racers in your class. In our club with out non-members showing up our numbers vary anywhere between 4 and 18, just depends on the weekend.