Two comments
while I agree w team building I still believe any bench player who is having serious grade issue should stay behind on some of the away trips, which can be two days of missing classes, to work on getting grades up. If it were my son I would be for that. Players need to know that school/grades r important and coach means business.
Ive seen at sons school where several players have changed majors due to baseball. Maybe they are young and never had passion for first major, but some are not willing to put in extra study time w baseball schedule. They are switching to majors they perceive are "easier". They all see academic advisors who spell out just what classes are needed, and some are realizing college is harder than HS. Nationally many students are not prepared for college and must take remedial courses. Guess it depends on how academic your HS was.