MamaBB,
It would help if you were able to give level (P5, mid D1, D2, etc.). There are some differences in what the norm is with each. Another separator is HA vs. non-HA.
That said, coaching changes are a fairly regular part of the landscape. I definitely understand some of your questioning with regards to keeping the coaches out of the decision making process and deciding on a school with the "would you still choose this school if baseball was removed" as a criteria. For many, the dialog and relationship with the coach/es becomes an integral part of the process. And, for many, baseball is more of a driving force than the academic aspect - it can be the primary motivator in keeping a student-athlete engaged in the academic side of college.
You have to understand the rationale behind the advice. The 4-40 argument is real. When the player is done playing, whether that is next year due to injury or cut from a program, four years from now after his senior year of college, or six years from now as the very good player finds himself hopelessly flailing in the minor league world of countless other very good players, he will have to have his college education and passion for his next chapter in place. What will he do for the next 40 years and what college experience has best prepared him for that? With regards to coaching changes, a recruit has to be aware that is can be a fairly common thing. So, he must consider the possibility in the decision making process. If, at some point during his college career, the coach/es moves on, will he still be in a place he wants to be? Granted, it is most difficult when the change occurs before he even steps on the campus as a freshman.
I always preach balance. If a young man is 100% baseball, a parent would be wise to make him aware of the 4-40 reality and encourage him to explore other interests so that when the inevitable happens, he has a starting point, some other things that he can identify with, both from a career and a personal interest standpoint. Can he move on and stay in the game? Yes, but that too is a perilous path with lots of dead ends. "Well, he'll just get into coaching." Sounds great. Is he prepared to work for nothing or next-to-nothing for the usual 6-10 years of "paying dues" after he gets his bachelors degree? That is the norm in this hugely overcrowded field with far more supply than demand. Hope he doesn't have much in student loans and you are still prepared to carry some of his expenses for a while. What? he met the right woman and wants to settle down? Hope she's good with living on nothing for a while. Start a family? Hmmm.
One of my sons is well on his way down this path (college coaching, not starting a family
). There is no one I know who is better suited to successfully navigate it. But, at any time in the next year or five, he could find himself at the end of those efforts due to lack of available career earning opportunities. He is moving full steam ahead, but still keeping one eye on what a plan B would be should that day come.
So, yes, if your son is driven largely by baseball at this point, a transfer may end up being a serious consideration. He should get informed as quickly as possible. If there is a new guy in place, he should contact him ASAP and try to get a feel for where he stands. Subsequently, he should be reaching out to other schools that were in play during the recruiting process and let them know what has happened and that there is a possibility that he will be put in a position to make a move (check any NCAA restrictions on this). Work on a solid plan B.
Best to him!