Ramona is a good place for a lot of reasons, but it won’t work due to terrain issues. There’s not enough room between Ramona and the mountains for an approach.
There’s a lot of places that are good for a lot of reasons but most of them have one or more insurmountable obstacles. The military sites (Miramar and Pendelton and, to a lesser extent, North Island) are the only places where an airport would actually fit and not have some huge obstacle or another. Except, of course, the fact that the military won’t give them up. Which is why the airport commission is in such a tough position.