i just moved a 17 year old to the majors (scouting discovery). he's developing on the bench as well or better as he would in the majors...
no guarantee but, i'll think about simming a couple more season and post the scouting report... i don't think he had a high-ceiling but we wasn't a 20/80 ovr/pot.
because of how some leagues are without minors, maybe the majors work differently in regard to development... this guy doesn't seem hampered one bit being a sub-.200 rated hitter in the MLB.