I am certainly no expert on baseball recruiting. My only experience is with my boys and the sons of some of my friends. That said, I am not familiar with highly regarded pro prospects de-commiting from colleges because they expect to be drafted high. To the contrary, that is a tool of leverage for them.
Looking at the time frame for your son, as you are aware, most top 2014's have either committed or have offers in hand. That is not meant to infer that your son is not a top prospect. Just being realistic about where we are on the calendar. As you mention, being invited to the Area Code tryouts and the Texas Scout Association showcase means that someone thinks your son is a prospect. Perhaps you could speak with someone that knows your son and ask for an honest assessment.
Another thing to keep in mind is the pecking order of commitments. My observations are that the big schools (SEC, Big 12, etc.) get their commitments, then the smaller schools (Southland, Sunbelt, etc.), then the big Juco's (San Jac, Navarro, etc.), then everyone else. Obviously this is a generalization.
So, in summary, I would say that if your son is wanting to go to LSU, A & M or a similar school, it may be time to start at least considering other options.
Hope this helps. BTW, I had two sons go the Juco route out of high school and one went directly to an SEC school.