i agree and this is where some kids really benefit from that fifth year to develop.
not always physically, some players take time to adjust to school, the campus, being away from home and struggle really participating in the program at a level to get the maximum benefit.
these are the perfect candidates for being red-shirt, but take a kid like jalen reagor or corey bethley. if you could keep either in the program from five years it would be a benefit to the program, but reagor has the type of talent that makes a jump to the nfl a very real possibility and the frogs did not have the depth at defensive tackle to sit corey for a year.