Each member of the California State Senate represents more people than a member of the House of Representatives.
I think it would be reasonable to make the California legislature unicameral, unless you do something wonky with how the Senate is elected. I don't see the point in just having two houses with no difference except the number of people each member represents.
Yeah, I think the same. The idea of a "State Senate", which is elected the same way than the lower house, at the same time and with the same system is pretty silly.