Team chemistry is often the factor that determines the success (or lack thereof) of a season. It is almost always the factor that determines if the season is an enjoyable experience for the players. So it is absolutely something to look at very closely. I think it’s fine to ask coaches what they do to foster it. But what I did during my kid’s recent recruitment was talk to players in the program. It helped that I knew them but players tend to tell the truth anyway. If you have been around enough teams you can sometimes pick up a vibe just by observing. Another great source for that kind of information are area MLB scouts. They interact with both coaches and players and they know where players are and aren’t happy. Whenever I talk to a scout I always ask him what College programs have impressed him lately and which haven’t. You would be surprised what I have been told.