Constructing a new airport a $50 cab ride away from the city in the boondocks will really hurt tourism.
I'd rather fly into Long Beach, rent a car, and see the beautiful Pacific Coast Highway. I've done it, it's gorgeous!
Don't fix what ain't broken.
Orange County, John Wayne is closer to SAN, and a lot more fun to fly into and out of! Short runways, and snotty rich folks on the take off path make for fun.
On take off, you sit on the end of the runway, brakes on, engines go to full, the brakes release, and you careen down the runway. Take off is much steeper than at other airports, and once you get about 2500 or so feet up, the engines throttle way back, for a moment you feel weightless. Once you cross over the ocean, the engines are throttled back up, pushing you back in your seat, and off you go. Its real fun in the back of a 757!