PG this is a great post and there have been a lot of great posts. I think one thing that reduces the number is player willing to travel out of state. I have had multiple player go site unseen to mid west colleges simply because they are from Southern California and play for a reputable program. There are some players that do not want to leave So Cal or California.
Another example of getting players out is the SGV Arsenal Program. Go and look at there website and see how many guys are leaving to go to college. Mike does a heck of a job getting players out and they really stress grades. I think if a player is willing to explore the nation and all levels of 4 yr. college baseball they will find a place to land. To often players and especially parents do not understand what level their player is at and have to lofty expectations of them and that holds a player back.